Hi guys
some things have changed. For example, now it is possible to delete the url files of shared folders and then go back to "shared" section and try to add them to Onedrive as folders and not as url links. I'm doing this test practically every two days: I delete the url file whenever I found them, go to shared, add links to my drive and add them back to my onedrive. Before I couldn't do it, it always gave an error. Now there are two scenarios: either it goes back as a url link or as a real folder. If you are lucky and you are in the second, maybe Onedrive locally takes a while to receive this change, but if A) the shared folder goes back as a folder and not as a url and B) you don't have to continuously work locally like me and you can afford a restore with its long times, running
%localappdata%\Microsoft\OneDrive\onedrive.exe /reset
or alternatively
C:\Program Files\Microsoft OneDrive\onedrive.exe /reset
can also bring the folders back to the local disk.
BE PATIENT: if you have a lot of files, resetting onedrive can take a very very very long time, especially if you have a lot of files to "physically" sync (i.e. to download locally).
Last... we changed the way we share our family folders: no more so many shares (based on the topic), but only one "giant" share per account. At the moment it is certainly more inconvenient, but as the situation recovers it allows us not to have to make dozens of clicks for this operation.
I hope it can be of help, bye