When clearing water with sponges, sometimes lily pads will keep floating
The bug
Sometimes when you clear water with sponges, lily pads will keep floating, if you place blocks next or under it, it's fine, but if you bug a block on the lily pad, it will be replaced.
How to reproduce
- Make a 5 × 5 pool of water as demonstrated in the attached picture. It doesn't seem to work in lakes/rivers
- Fill it with water
- Place lily pads on the water, the more you place, the better, it will just increase the chance just leave a hole to place a sponge in the water
- Place the sponge where you left the hole
Video demonstrating the issue: https://www.youtube.com/watch?v=7fMQuABS19Y
Created Issue:
Phantom Lily Pads
Bug: Sometimes when you clear water with sponges, lily pads will keep floating, if you place blocks next or under it, it's fine, but if you bug a block ON the lily pad, it will be replaced.
Steps to reproduce:
1:Make a pool of water, it doesn't seem to work in lakes/rivers. IMG. 1
2:Fill it with water. IMG. 2
3:Place lily pads on the water, the more you place, the better, it will just increase the chance; just leave a hole to place a sponge in the water. IMG. 3
4:Place the sponge where you left the hole.Environment
Java Version: jdk1.7_75
Operating System: Windows 7
Floating/Phantom Lily Pads
Bug: Sometimes when you clear water with sponges, lily pads will keep floating, if you place blocks next or under it, it's fine, but if you bug a block ON the lily pad, it will be replaced.
Steps to reproduce:
1:Make a pool of water, it doesn't seem to work in lakes/rivers. IMG. 1
2:Fill it with water. IMG. 2
3:Place lily pads on the water, the more you place, the better, it will just increase the chance; just leave a hole to place a sponge in the water. IMG. 3
4:Place the sponge where you left the hole.
Bug: Sometimes when you clear water with sponges, lily pads will keep floating, if you place blocks next or under it, it's fine, but if you bug a block ON the lily pad, it will be replaced.
Steps to reproduce:
1:Make a pool of water, it doesn't seem to work in lakes/rivers. IMG. 1
2:Fill it with water. IMG. 2
3:Place lily pads on the water, the more you place, the better, it will just increase the chance; just leave a hole to place a sponge in the water. IMG. 3
4:Place the sponge where you left the hole.The bug
Sometimes when you clear water with sponges, lily pads will keep floating, if you place blocks next or under it, it's fine, but if you bug a block on the lily pad, it will be replaced.
How to reproduce
- Make a pool of water as demonstrated in the attached pictures. It doesn't seem to work in lakes/rivers
- Fill it with water
- Place lily pads on the water, the more you place, the better, it will just increase the chance just leave a hole to place a sponge in the water
- Place the sponge where you left the hole.
Video demonstrating the issue: https://www.youtube.com/watch?v=7fMQuABS19Y
Java Version: jdk1.7_75
Operating System: Windows 7
The bug
Sometimes when you clear water with sponges, lily pads will keep floating, if you place blocks next or under it, it's fine, but if you bug a block on the lily pad, it will be replaced.
How to reproduce
- Make a pool of water as demonstrated in the attached pictures. It doesn't seem to work in lakes/rivers
- Fill it with water
- Place lily pads on the water, the more you place, the better, it will just increase the chance just leave a hole to place a sponge in the water
- Place the sponge where you left the hole
.Video demonstrating the issue: https://www.youtube.com/watch?v=7fMQuABS19Y
Floating/Phantom Lily PadsWhen clearing water with sponges, sometimes lily pads will keep floating
The bug
Sometimes when you clear water with sponges, lily pads will keep floating, if you place blocks next or under it, it's fine, but if you bug a block on the lily pad, it will be replaced.
How to reproduce
- Make a pool of water as demonstrated in the attached picture
s. It doesn't seem to work in lakes/rivers- Fill it with water
- Place lily pads on the water, the more you place, the better, it will just increase the chance just leave a hole to place a sponge in the water
- Place the sponge where you left the hole
Video demonstrating the issue: https://www.youtube.com/watch?v=7fMQuABS19Y
The bug
Sometimes when you clear water with sponges, lily pads will keep floating, if you place blocks next or under it, it's fine, but if you bug a block on the lily pad, it will be replaced.
How to reproduce
- Make a 5 × 5 pool of water as demonstrated in the attached picture. It doesn't seem to work in lakes/rivers
- Fill it with water
- Place lily pads on the water, the more you place, the better, it will just increase the chance just leave a hole to place a sponge in the water
- Place the sponge where you left the hole
Video demonstrating the issue: https://www.youtube.com/watch?v=7fMQuABS19Y

Confirmed in 1.8.2-pre6. Seems to happen around 1/90 of the time.
Confirmed in 1.8.2-pre6 but a little note: These are ghost blocks, click on it and they disappear.
Can anyone come up with a more reliable way to replicate this? It is really hard to get it to happen.
Confirmed for 15w40b
Confirmed for 15w40a
I only had it happen once but if I counted right the ghost lily pad did not drop an item when the water under it disappeared.
Confirmed for 15w41b
Video:
https://www.youtube.com/watch?v=7fMQuABS19Y
Confirmed for 15w42a
Confirmed for 15w43a
Confirmed for 15w44a
Confirmed for 15w46a
Confirmed for 1.9.3-pre3
Can't reproduce this in MC 1.12.1 after 10 tries using a 7x7 water pool.
Fixed? Bad luck? Can anyone else reproduce this in the newest version of Minecraft?
When experimenting with this myself I found that this issue is a manifestation of
MC-9591If you relog after placing the lily pads but before placing the sponge you will find all lily pads still there will always be removed when the sponge as is placed.
Can confirm in 20w51a.
Can confirm in 21w03a.
Can confirm in 21w05b.
Can confirm in 21w06a.
Can confirm in 21w07a. Video attached.
In my testing, this issue was present in 21w10a, but no longer occurs in versions above or equal to 21w11a. With that being said, this issue has been fixed in 21w11a.