Crashing can happen when you run out of RAM, large maps (streets/lighthouse). You need minimum of 16GB (32 is ideal).
If you're sure RAM isn't the issue, try deleted SPT + live tarkov and download everything again.
I have 16 GBs of RAM, tried running the game with task manager on my 2nd screen and RAM usage never exceeded 70%. Tried reinstalling SPT just now and the issue continues, I'll try to reinstall the game now.