Bug: Light bridges with Adhesion Gel don't correctly allow the player to climb/walk on them at certain angles

[benjaminpants]

Describe the bug

Light bridges facing directly down or at sharp angles don't let the player climb/walk on them correctly, moving slowly and not making any footstep sounds, notably the one at roughly 45 degrees appears to work fine, but the player could be going slower on it and I just didn't notice.

2026-04-12.15-33-41.mp4

Issue Map

Map that demonstrates this issue:
brideadhesiontest.bsp

To Reproduce

1. Open the map
2. Spray the bridges with the provided paintgun
3. Notice the weird behavior when climbing/walking on them with adhesion gel.

Operating System

No response