Portal 2 Bug: Crouch walk towards a `func_brush` slows down the player

[LambdaCore21]

Describe the bug

The example map has two tile textured walls, both are func_brush

map vmf and bsp.zip

To Reproduce

Try the map

Issue Map

Any map

Expected Behavior

Crouched player should maintain normal walking speed at all times

Operating System

No response