I haven’t experienced any crashing as of yet. I too used a cross-save from my PS5 to my PC. (I’m using the Steam version also).
As soon as I loaded up that save to my PC, I immediately turned off the cross-save feature in the options and did a quick save and it was successful. I then loaded up that save and played from it after it synced with Steam cloud. I have not turned the Larian cross-save feature back and I deleted the save that was from the PS5 just in case.
I’m not sure what could’ve caused your game to crash. Do you have another clean save from the PS5? You could try what I did to see if it helps.
