Distorted/Warped Textures On Character Model After Bundling For Tabletop Simulator/In A Build

Hello, I'm having an issue with textures on models that I build into asset bundles for the game Tabletop Simulator. In the editor the model appears fine, but when bundled and imported into Tabletop Simulator the textures break and turn blocky/blotchy. I have no idea whether it's the resolution of the textures or if there's a problem with the lightmapping, but if anyone has any sage advice I'd very much appreciate it.

In Unity In Tabletop Simulator/In Build