Media player UX occasionally breaks down horribly
Recently I've been using Jolla's media player with bluetooth headphones, alternating between using the buttons on the headphones and the player GUI for controlling playback. Given all the known flaws of the player it worked nicely until I had it open for a longer time than usual and switched between shuffle all and play a single album multiple times. At some point I noticed that it stopped playing after the 2nd or 3rd song in the album (starting at the 1st, shuffle off). A quick glance at the playback queue showed why: the rest weren't added to the queue in the first place. Choosing another album and starting playback at its 1st track gave the same result. Trying with shuffle enabled, however, seemed to work as expected.
May or may not be related: at some point during my experiments I ended up with the queue disappearing entirely, vanishing even form the pulley menu. As a side effect this also obliterated the playback controls form the GUI. All that was left was the blank rectangle where they should have been. I have about 900 songs in the music library on my jolla, most of them as flac, and some as mp3. This seems to have been a bit much for it to handle before so it may be related as well.