While I don't think it's a AMS2 problem as much as a latest Win11 problem (since it happened after their last big patch), I'm losing ALL FBB in my T-GT in AMS2 when I start it. AMS2 is the only game that's "losing" the FFB for some strange reason. In my Control Panel, I've noticed the wheel keeps resetting to 0% FFB, even if I raise it or just reset Default, as soon as I start AMS2. Also, the Apply button is permanently greyed out, hence my thinking it's more a Win11 problem, so I thought I'd ask if anyone else was having the problem just in here.
Same happened to me. I reversed the latest windows 11 update and everything is working now. I also froze updates for a few weeks hoping that the problem will be fixed in the meantime.