I’ve noticed a spot / moment when the game crashes for me and so far I could reproduce it 2 times with two different cars - Sagaris FE tuned to S2 998 and 917/20 with engine swap (X999).
When you’re in freeroam, go to the roundabout at the bottom of the highway and start going north, at the next roundabout at the north turn around and make another loop. When going north again, about a second after entering the first tunnel, the game hangs, shows a grey screen for a split second and then crashes to desktop.
This seems to be something in-game as I’ve already tried different brand GPU and even MB (was upgrading in process) and reinstalled Windows + Forza.
I run 144Hz 3440x1440 with all settings at maximum + 2xMSAA.