So, I thought it was safe to use the Library. I know it's not safe to use the gallery in my game (and on more than one Xbox one/series S) without getting error codes but I thought my library would be ok. I used rooms I'd created and that seemed ok, no error codes.
So I tried to download a lot from the library which I'd also saved to the Gallery. Big mistake. Now I'm getting error messages about my saves. There isn't a code this time but every time I start up my game I get an error message that says the following:
The saved data we have on the Xbox network for the Sims 4 is different from the data on this console. It shows me 2 save options to load from, my last game which has successfully saved to my Console and the day before which is saved to the cloud. I choose my most recent game and it does a data synch. My progress is there.
I'm anxious about the next action I take because my game obviously isn't saving to the cloud. There is a massive problem here using the gallery and the library. It shouldn't be affecting people's save files but it's been doing this for years now. I'm adding it here, despite as yet seeing no code because it is obvious to me that it's linked.
I'm just rebuilding my game now, since I had to delete everything in January to try and fix crashing. I hope I'm not going to lose it all again.