I have recently had an issue with the game Forza Horizon 4 not working and after some research and a possible confirmation on what i did to fix it i believe the issue is in the ver 20.4.? optional drivers. https://answers.microsoft.com/en-us/xbox/forum/all/forza-horizon-crash/9c0e595b-0763-4ea4-9cc8-0e5ac.... This link is to a discussion I had on Microsoft support page today and it appears to confirm this. My game runs fine now but it would crash as indicated by the OP of the issue. Their game does not work while mine does and only difference is the driver pack. I am running the ver 20.2.2 after reverting from the 20.4 optional drivers. I will do a test in a little bit to confirm this and I will update later.
please report that BUG to AMD Driver support