In the latest MC versions (currently Win 25.0.89) something strange happens with zones. I have two zones named "IPC" and "Local". Local is for playback of locally stored media files, while Zoneswitch automatically swithces to IPC zone and stops Local when Tidal is used. This works fine. But when playing Local, after a few minutes, MC focus shifts from Local to IPC. In Playing Now, IPC is highlighted and MC header shifts to IPC, including the volume control.
But - Local is still playing (as it should be), and Local is marked in Playing Now as the active zone. I use Internal Volume, and to make this work, I need to switch from compact view to normal view, click on the playing (Local) zone.
When this occurs, I do not have Tidal running, and there should be no reason for MC to switch zone. So it does not seem to be linked to zoneswitch being activated. I am testing now to see if this happens with zoneswitch turned off.