FH4 froze on me multiple times today October 22. Game Pass version on Xbox One X. It will freeze in various menu screens, pause mode or while doing a race rewind. I have been playing every day since launch and freezing started happening only the last couple of days with today the worst. The game has even kicked me out to the dashboard I think twice. All I can think of that might help is to do a full shutdown and restart.
I think the whole Horizon Life online aspect is causing it. I played FH3 for many hours and don’t remember any freezes or crashes.