Using the Plex app (not Plexamp), version 8.4, just updated yesterday (6/13).
Issue seems to have started this morning where if i’ve got a playlist going on shuffle & I skip to the next song partway through, I end up with the 2nd song playing normal volume, and the song I skipped continuing to play at maybe 25-30% volume underneath.
Force quitting the app and restarting fixes it, but only till I skip through a song or two again, then it’s back. Has literally not done this ever before until this morning, so i’m guessing it’s related to the most recent update.