Even when you're full, your hearts will not fully recover, and you will stop at half a heart missing.
If you take off all your equipment and die, you will fully recover, but if you take damage after re-equipping it and recover, you will not be fully recovered and will return to being half a heart missing.
Linked issues
Comments 2
Thank you for your report!
We're tracking this issue in MCPE-182594, so this ticket is being resolved and linked as a duplicate.
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