Turned out this bug was already fixed two years ago but unfortunately
it made its way back again. It was solved in #9642 but back then another
method was used for querying playlists from db (for add playlist dialog) then in
ef4a6238c8 was introduced another method
which had the same problem as fixed in #9642 and which eventually replaced
original method in code for querying playlists from db (for add playlist dialog)
402f43e895