When you're flying on a ceiling with elytra in survival, you sometimes can see water bubbles in the hotbar for a few sec. If you're not careful enough, you could take suffocation damage as if there is a block ahead of you, even though there is not.

Step to Reproduce
1. Build a layer of stone
2. Fly with elytra below the ceiling.

Expected Result
You don't take suffocation damage or any clipping at all when flying on ceilings.

Observed Result
The game tries to clip into the layer of stone and you take suffocation damage.