If one places a slab on the floor and then any other block 1.5 blocks above it (2 blocks off the ground without that slab) and then crouch in between them they will suffocate. Water bubbles will appear in the hotbar and player will take slow suffocation damage.
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[Mod] EVGENSYPERPRO
migrated
Thank you for your report!
We're tracking this issue in MCPE-166473, so this ticket is being resolved and linked as a duplicate.
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