The bug
While on fire, the player is often immune to fall damage. From my testing, this does not seem to affect other kinds of damage-over-time effects like poison, or other types of damage like enemy attacks.
How to reproduce
1. Get on a high pillar and place fire
2. Enter survival mode, get lit on fire, then jump off
3. Land
It's not perfectly consistent, but is relatively easy to recreate
VIDEO:
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We're actually already tracking this issue at MCPE-37680, so we will resolve and link this ticket as a duplicate.
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