The bug
You can clip into half slabs underwater and while in them can breathe.
How to reproduce
Place a slab on the top half of a block underwater.
Break the block beneath so you have a space of 1.5 blocks.
Swim under the slab and stand up.
→ ❌ You are now clipped into the slab.
Linked issues
relates to 1
Attachments
Comments 4
This relates to MC-96922, because the swimming mechanic is similar to the elytra mechanic.
This relates to [MC-125240]