Fall damage occurs by the difference between the Y level of Worldspawn/Bedspawn at the Overworld and the Y level of BedrockPlattform/EndPortal at the end, and it seems to happen after the second time you enter the end (after end generation).
Don't place your bed below y=64, the deeper your bedspawn the higher the damage you will take.
When entering the End, try to use a end portal below y=40, as the obsidian plattform is usually generated at that height
When leaving the End, make sure your bed was higher that y=64
For everyone experiencing this bug until they release a hotfix for 1.17.10, the workaround is the following:
For worlds without cheats enabled:
Using Slow Falling potion will not damage/kill when traveling between the Overwold/End
Using Feather Falling boots will reduce the damage but death can happen if height difference is huge.
Ender chest is the last resort, you can combine it with the feather falling boots.
For worlds with cheats enabled:
/gamerule falldamage false will do the trick, just remember to enable it again
/effect @s feather_falling will help make sure you give yourself enough effect time
/gamerule keepInventory true will help you not lose your items/xp, but you will die anyways.
etc etc
You may be able to recover items, but this is only achievable with commands:
Use /fill -32 1 -32 32 1 32 stone to make a 64x64 plattform at level y=1
Then /tp0 2 0
**Your stuff will be at the Y level of your bed at Overwolrd, let it fall from that level to the plattform and you will get back your stuff
Note: your stuff could be trapped inside the end stone, you may need to search for it inside the end island at x=0,z=0 through the Y level (search near your bed Y level from overworld)
Just remember the 5 minute grace from the chunk load until the disappearance of your items, I think it is related to your worlds simulation distance. less is better for recovering items.
I attach a screenshot of the tool I used to figure this
Bed from this test was at y=2
After death, I used the tool and the items were at the head height of the bedspawn but at the End, instead of the overworld, so your items will be at te Y level of your bed but at the end, thats why youll need to make a platform so your items wont be lost at the void.
Alan Fernando Echave Meza
MCPE-132484
Fall damage occurs by the difference between the Y level of Worldspawn/Bedspawn at the Overworld and the Y level of BedrockPlattform/EndPortal at the end, and it seems to happen after the second time you enter the end (after end generation).
Don't place your bed below y=64, the deeper your bedspawn the higher the damage you will take.
For everyone experiencing this bug until they release a hotfix for 1.17.10, the workaround is the following:
For worlds without cheats enabled:
For worlds with cheats enabled:
You may be able to recover items, but this is only achievable with commands:
**Your stuff will be at the Y level of your bed at Overwolrd, let it fall from that level to the plattform and you will get back your stuff
Note: your stuff could be trapped inside the end stone, you may need to search for it inside the end island at x=0,z=0 through the Y level (search near your bed Y level from overworld)
Just remember the 5 minute grace from the chunk load until the disappearance of your items, I think it is related to your worlds simulation distance. less is better for recovering items.
I attach a screenshot of the tool I used to figure this
Bed from this test was at y=2
After death, I used the tool and the items were at the head height of the bedspawn but at the End, instead of the overworld, so your items will be at te Y level of your bed but at the end, thats why youll need to make a platform so your items wont be lost at the void.