Deleting trusted user deleted all data
I can't readily reproduce this, but yesterday a user had forgotten their password. (This happened before -- something about Chrome password manager updating the PSONO log-in password when they add a password entry.)
The fix was to delete the user and allow them to create their account anew. After this, I saw that they had two users in my Trusted Users section. (This password issue had happened to them once before.) I added the new user to the groups I need them to be a member of, and they were in. I then went back to the trusted users section and deleted the two trusted users that I thought were older users.
What happened next is that psono got me back to the Home section, and I had two trusted users -- other users, not even the one just added. The complete password list was missing, including everything I had made and shared and everything personal, and in its place was two trusted users.
I don't really have a way to recover from this.. I went to my Groups section, because the shared stuff is shared separately, right? My groups section had the button "Accept Pending Request" next to each group that I was a member of. Clicking that, it pops up the "Where do you want to put these?" and I placed them in my root. I deleted the two trusted users from Home, and now I have all of the shared passwords (without interaction from anyone else), but my personal passwords are all gone.