We have once again disabled Steam sync. After liaising with Steam it became clear that there is a bug at Steam's side with their sync product which they have now admitted to. However, they don't seem to have any appetite to fix it because the ETA for a fix is "unknown." Their proposed fix of reducing files both; doesn't work for some of the player base and it doesn't seem to always work anyway.
I am sorry to anyone this affects, but it is out of our hands until they fix their issue. This also means GeForce NOW is off the table for players that want to use that.
I suggest you setup some kind of backup of your player profile. DO NOT use Onedrive or google file sync, that causes its own headaches and problems. See the bug reports channel in discord for a workaround if you do have any of those.