Bug: CSM shadows do not render on vertical faces with a PBR texture applied

[Equalizer5118]

Describe the bug

When a CSM shadow is projected onto a vertical PBR material, the shadows do not render and instead use lightmaps. However, PBR materials that are horizontal do show CSM shadows, unless they were spawned vertically and then rotated. I am on the staging branch.

Images

LightmappedGeneric:

PBR:

PBR (horizontal)

PBR (spawned vertical, rotated):

To Reproduce

1. Open the given map
2. Observe bug

Issue Map

N/A, example map here: csmpbrbug.zip

Expected Behavior

CSM shadows should work correctly when at this angle

Operating System

Windows 11