I have Insync 3.3.1 in two Ubuntu machines (a desktop fully synched, and a laptop with only some folders synched).
This morning, the laptop told me the token expired, so I renewed it. After a few minutes, I suddenly saw how the files of a folder I did not touch (called “OLD”, inside a folder called “HOME”) started being deleted.
Also, not sure if related, a bunch of subfolders (maybe also files?) of a completely different folder I recently unshared (inside a folder called “RESEARCH”) started appearing in my main Insync folder. Amongst them, a bunch of “OLD” folders: OLD, OLD (2), OLD (3), OLD (4). Some empty, some with content… I did have an OLD folder in this completely different subfolder, but definitely not 5. By the way, this FOLDER (2)… issue has been a very common thing for me in shared folders, and it is really frustrating.