sneak/shift will sometimes auto-deploy

Put the summary of the bug you're having here

What I expected to happen was...:
I hit the wall and... that's it

What actually happened was...:
I go underneath even when the shift button wasn't physically touched

Steps to Reproduce:
1. make a platform of bottom slabs so that your Y coordinate is XX.5
2. place a roof above it so that there is a 1.5 block space
3. start ramming your body into it from weird angles. Going forward + strafing does it for me