Game Crash in Region with high grass

Played without lags or fps-drops, till I saw high grass on the map, the lag starts and the game crashed.

My first reaction, damn lets put all setting to lowest, done.
Restart game, crash while loading, could not even see the map.

Any other ideas?

I think my hardware is not the problem (7800X3D, 64GB RAM, RX 7900XT - ofc newest driver installed)

thanks for any hints! :)

Well first time the repair function in steam was usefull, no crashes after that so far.