The title is a little bit confusing, but when you fall from 2 blocks height consecutively while holding the space bar (jump button) you'll take fall damage, that can be a very serious problem. I'm putting a video here so it's easier to understand and replicate it (to replicate it hold the space bar ALL THE TIME and jump just like I did in the video.
Attachments
Comments 5
Can confirm in Android
Steps to reproduce
Create an setup (From attachments), Which 2 block and 4 block heights into staring blocks
Jump into the top of 4th block area
Sprint and jump to 2nd block area then jump to ground floor
Observed Result
The player can be damaged by 1/2 hearts after jumps at 2 blocks height area
Expected Behavior
Player can would won't be damage after jumps at 2 blocks height area (Just like java Edition)
Can confirm on iOS in the 1.20.60.25 Preview
The issue is only replicated if the jump button is held down continuously. If you don't hold down the jump button, the player won't receive fall damage after falling 2 blocks.
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I cannot reproduce this in 1.20.70.20 Preview. I believe it is fixed by the fix for MCPE-126454.
Can confirm.