Plutonium

Kind of a shame that this is still an issue. It happens to anyone playing on controller and the only way you can avoid it is to make sure you make a KBM imput before tabbing out. They should be dealing with this and not with FOV, because its really common and a pain in the ass

Don't do any of that. It's not a mod issue. From my understanding the map is devided in files (so consoles could run it, which is ironic cause it made pcs not be able to) so your game crashes when it references a point that it hasn't loaded from a file yet. It's a null pointer exception.
Fixing it depends on your gpu and your operative system. For me, setting the game at 45 FPS did it. Idk if it was the fps or the vertical sync desabling, but no more crashes ever since.
This won't be fixed by the mod devs since its not a mod issue.

If you are using a non xbox controller and a third party driver that might be causing it. It was for me. Set your controller up before launching the game