iOS Files App Favorites Folder Disappear

[FrankieT]

On both my iPad and my iPhone, when I mark a folder from Dropbox or any other cloud service as a “Favorite”, it shows up in my favorite list in the Files app, but if I switch apps or close the files app, when I reopen it, the folder disappears from the favorites list.  

[cjcornell]

It is still happening - but I just found a way to "fix" it...

for me, not only were the dropbox folders disappearing from ios file "favorites" - when long press the folder in dropbox (or in file manager) the folder appeared to still be marked as a favorite - and I could not UNfavorite it. 

Anyway - instead I just dragged the folder back over the Faviorites section - and it appeared.

so - problem "solved" or at least worked-around.