hgo58
Major Contributor
I really don't think this has to do with auto sensing alone but is somehow caused by the WiiM forcing the TV to output on ARC.Wiim are currently working on this.
From wiim
Currently, HDMI auto-sense is enabled by default on the WiiM Ultra, and there is no option to disable it at this time. However, we plan to add a toggle switch for HDMI auto-sense in a future update.
The function of the "Automatically output audio to WiiM when TV is on" setting has been lost.