Mobs swim above height of lava slice instead of leaving lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice. See also: fourth note
Behavior: Mobs swim upwards when being pushed away by lava. They jump up and down in place (x and z values not changing), repeatedly resetting their fire until they die.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior, at least at one point. But the player cannot do the same (does this count as including 2 bugs in one?)
Expected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lava
Linked Issues
duplicates1
Created Issue:
Mobs swim above height of lava slice
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that this may have been intended behavior, but it still doesn't seem to be done right to me
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that this may have been intended behavior, but it still doesn't seem to be done right to me
Expected behavior: Mob runs out of lava, pathfinding to the nearest non-lava block
Alternative expected or coinciding behavior: lava pushes mob out of lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that this may have been intended behavior, but it still doesn't seem to be done right to me
Expected behavior: Mob runs out of lava, pathfinding to the nearest non-lava
block
Alternative expected or coinciding behavior: lava pushes mob out of lavaWhen I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that this may have been intended behavior, but it still doesn't seem to be done right to me
Expected behavior: Mob runs out of lava, pathfinding to the nearest non-lava place to stand
Alternative expected or coinciding behavior: lava pushes mob out of lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that this may have been intended behavior, but it still doesn't seem to be done right to me
Expected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
Alternative expected or coinciding behavior: lava pushes mob out of lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that this may have been intended behavior, but it still doesn't seem to be done right to me
Expected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
Alternative expected or coinciding behavior: lava pushes mob out of lavaWhen I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that this may have been intended behavior,
but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
Alternative expected or coinciding behavior: lava pushes mob out of lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that
this may have beenintended behavior,but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
Alternative expected or coinciding behavior: lava pushes mob out of lavaWhen I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior,
but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
Alternative expected or coinciding behavior: lava pushes mob out of lava
Mobs swim above height of lava slice instead of leaving lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior,
but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
Alternative expected or coinciding behavior: lava pushes mob out of lavaWhen I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior,
but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note:I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwardsFourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior,
but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lavaWhen I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Behavior: Mobs swim upwards when being pushed away by lava.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior,
but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Behavior: Mobs swim upwards when being pushed away by lava. They jump up and down in place, repeatedly resetting their fire until they die.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior,
but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Behavior: Mobs swim upwards when being pushed away by lava. They jump up and down in place (x and z values not changing), repeatedly resetting their fire until they die.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior,
but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Behavior: Mobs swim upwards when being pushed away by lava. They jump up and down in place (x and z values not changing), repeatedly resetting their fire until they die.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior,
but it still doesn't seem to be done right to meExpected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lavaWhen I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Behavior: Mobs swim upwards when being pushed away by lava. They jump up and down in place (x and z values not changing), repeatedly resetting their fire until they die.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior, at least at one point. But the player cannot do the same (does this count as including 2 bugs in one?)
Expected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lava
When I pushed mobs into a slice of lava, they swam above the height of the lava slice.
Behavior: Mobs swim upwards when being pushed away by lava. They jump up and down in place (x and z values not changing), repeatedly resetting their fire until they die.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior, at least at one point. But the player cannot do the same (does this count as including 2 bugs in one?)
Expected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lavaWhen I pushed mobs into a slice of lava, they swam above the height of the lava slice. See also: fourth note
Behavior: Mobs swim upwards when being pushed away by lava. They jump up and down in place (x and z values not changing), repeatedly resetting their fire until they die.
Note: it didn't seem like they were being pushed by the lava as they traveled upwards
Second note: Mobs (ex. creepers) seem to have an AI thing that makes them swim upwards in lava
Third note: I would like to distinguish that it was swimming upwards, at least it didn't seem like it was jumping upwards
Fourth note: lava slows movement, and swimming up the block is how you can get to a block at the same height of the lava slice. This signifies that mobs traveling upwards to get out of lava is intended behavior, at least at one point. But the player cannot do the same (does this count as including 2 bugs in one?)
Expected behavior: Mob runs out of lava (as it is on fire), pathfinding to the nearest non-lava place to stand
This happens even if a block is above the mob
Alternative expected or coinciding behavior: lava pushes mob out of lava
duplicates


When mobs are trying to swim while they are directly against another block, they gain a lot more vertical momentum than they otherwise would. Are the creepers in those screenshots being pressed up against any blocks?
They are up against wall blocks
They go up to the height of one block and then fall down
Thank you for your report!
We're already tracking this issue at
MC-150455, so I will resolve and link this ticket as a duplicate.If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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