Character Preview in Inventory issue (Brightness?)

Hi all,

I've recently been messing about with a dedicated server for the Freedom Fighter scenario, and I've run into the following issue.

After about 10 - 15 minutes playtime, the character preview in the inventory UI tends to look like this.

I'm assuming it's likely either a mod conflict, that I deleted a core mod, or something similar. I'll go through the usual troubleshooting, verifying files and mod compatibility etc, but I'm wondering if any folks here might recognise this as a specific issue?

Cheers!

https://preview.redd.it/90ta2twcnnmg1.png?width=1920&format=png&auto=webp&s=f49037670777045cd344135ff099815431eb21ae