Updated Wednesday. Rebooted. My audio out changed to a device that's not attached and the volume went to 0. I manually selected the correct device, changed the volume and all has been good. Today I got out my bluetooth ear buds and it connected, but did not change the audio output (still pumped out of my TV speakers). I had to manually change to the headset and turn the volume up from 0.
Is this a known plasma bug? Fix incoming? It's just a minor inconvenience but thought I would ask.
EDIT: After manually changing the devices, it's now switching automatically again. Very odd.