When you heal at a perfect time or when your healing too fast like regeneration 9 then when you are supposed to take damage By falling or being attacked. The damage is completely ignored. I notice this when I eat a enchanted golden apple then fell from a fatal height and I took no damage.
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Comments 2
Thank you for your report!
We're actually already tracking this issue at MCPE-64851, so I will resolve and link this ticket as a duplicate.
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relates to/duplicates MCPE-36131