Albums get duplicated in the Organize dialog when creating or checking/unchecking
As reported downstream, the Organize dialog - invoked when you select pictures and click "Add to Album" - seems badly broken in 42.0. Adding an album creates two entries for it. Clicking an entry for an existing album that actually works (sometimes they don't) more than a couple of times seems to result in it being duplicated on each click, so you quickly get a huge list of entries for the same album. Clicking any non-selected entry for that album results in a new selected entry for that album appearing, and vice versa (clicking a selected entry results in a new non-selected entry).
I kinda suspect this is related to the changes to using g_auto
that landed between 40.0 and 42.0, but just reverting the one in src/photos-organize-collection-view.c
doesn't seem to fix the problem.
See demonstration video from downstream report.