My best guess is some sort of mod corruption that they were not installed properly that led to the save game corruption. Or something more hidden like with the waterflow bug. Im 128h in and added some more mods i have 228 active mods now still everything fine even self ported stuff. I dont think its some kind of mod overload that causes this then it would be a more known issue. I have some larger ones and also lots of crafting stuff and all is fine now. I now tested what i could but i cant get it to corrupt again so i cant bring anything new to the discussion. I guess it will stay a mistery why it did happen and now it is fine with almost twice as many mods.