WP commit 2d303cf6 has set HDMI to Off profile after display exits suspend and renames plasma-pa on-board device
Starting with WP commit 2d303cf6 plasma-pa widget no longer lists the HDMI device after the screen has exited suspend while the default sink Line Out (Built-in Audio Analog Surround 2.1) device name has become simply Line Out.
Upon further inspection plasma-pa still has all the profiles for the on-board device with the expected Analog Surround 2.1 output being selected, so the post-suspend name change might be more of annoyance. However HDMI device is set from the expected Digital Stereo (HDMI 4) Output profile to the Off profile and as such is no longer listed by the plasma-pa widget.
Edited by Niklāvs Koļesņikovs