The Elytra can currently kill players when they fall from a height that they shouldn't take fall damage from...
How To Replicate:
Step 1: Using an elytra, fly into a wall (which gives you the bug enabling you to walk through gaps which you otherwise shouldn't)
Step 2: In the end, go to any place that has a Shulker and get hit so you get the levitation effect, once floated into a block, you will see nothing but the inside of a given block.
Step 3: Once the leviation effect wears off, you will fall (Likely from 4 blocks or so) and despite not being a height that you would take fall damage from, you will die instantly upon touching the ground.
I will update with a video when possible...
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We're tracking this issue in MCPE-105490, so this ticket is being resolved and linked as a duplicate.
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