Parity issue: Bed collision box is too large

The bug

Bed collision box is too large, unlike Java.

Steps to Reproduce:

1. Build this structure from the screenshot provided. There are no hidden blocks. You might need some other temporary blocks placing the topmost bed, but it's possible!

2. Stand on either side, center yourself to the middle of the 2 wooden slabs from a side.

3. Sneak, and try to go through.

Observed Result:

You can’t.

Expected Result:
If you sneak, you should be allowed through and be able to step up on the bottommost bed like Java.