In the last few days, I have noticed that typing a room list filter like "Riot" will "sometimes" leave out rooms that should be shown. (All the rooms on screen do match the filter, but there are other additional rooms that are not shown for some reason.)

As a possibly related note, when I backspace to clear the filter, the main Rooms section of the room list sometimes appears entirely empty until I manually scroll it with the mouse, and then all the rooms appear again.

@lampholder has also observed similar behaviour in the last few days. (We both use Firefox Nightly, in case that matters.)

Unfortunately, I don't have a good repro case yet. 😓