Same issue, RX5700. I have tested all drivers back to 19.2. Tried a fresh windows install and everything is the same.
I have tried every setting from low to high, vsync on and off. 100% default install of the game. Never touched custom scenery or airplanes.
Runs really good, right up until the inevitable crash a few minutes in for most planes, instant crash in the cessna 172 which also has texture issues.
This is a fresh log just loading the game and immediately crashing in the cessna.