I had a post previously about similar behavior with AC that turned out to be a corrupt file in the Custom Shader’s Patch. When my wheel was off, it would load—when it was on, it would not. However, it was isolated to a single track and an updated ini shaders file for that track fixed it. I suspect something is happening that is triggered by Shaders Patch and track or car configs being out of sync. With updated files, my wheel is working fine in AC with the latest Custom Shaders Patch and firmware 50.3.
Maybe reinstall the shaders patch, and importantly, in Content Manager, under Settings, Shaders Patch, update all the track and car configs.
One more thing . . .it just so happened that several significant shaders patch updates were released about the same time as 50.3 firmware. I originally blamed the firmware for conflicts created by the shaders patch updates.
To test whether it’s the shaders patch, you could temporarily disable it and load stock AC and see if it works.