Player is not damaged from environmental factors (i.e. Falling in lava, fall damage, drowning)
The game was restarted and still exhibited the same bug.
This issue was discovered in a map that was imported from a previous snapshot/version of Minecraft.
The issue does not persist into a new world.
The map was last updated from 19w36a
Links to video of bug:
Fall Clip: https://www.youtube.com/watch?v=coZ7Wne3Upw&feature=youtu.be
Lava Clip: https://www.youtube.com/watch?v=qyAgWPAJszo&feature=youtu.be