When you are crouching and you get knocked into the water (eg by a monster or player) you can not get out because you can not stop crouching. The crouch button disappears when you are in the water. If you are crouched and get knocked in, you just sink and there is nothing you can do about it in survival. You have to die to get out and loose all of your items in the process. I hope you can fix this.
Thanks
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Comments 5
Thank you for your report!
We're actually already tracking this issue at MCPE-38212, so we will resolve and link this ticket as a duplicate.
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Same thing happens if you are crouched and (accidentally) jump into the water. The condition can be corrected by relogging if you are quick enough (save-quit, and reload the game), but that is an unacceptable work around, particularly if the player is under attack or low on health or particularly if playing without natural health regeneration.