I found 1 mod, that contained "spnpccharacters.xml" file, but it was toggled off. I dont know if that affected my problem in any way.
I deleted this mod and loaded save file that is 30 days before crash appearance (crashing starts about Spring 24 1085). Now its Summer 20 1085 and everything seems to work fine.
Don't think that everything solved, so... But it works for now. Need to test for some longer.