Sony A9G and ARC, sound cuts

I have replaced my Playbar with an Arc. I am using a Sony A9G. All devices fully updated with latest firmware. The ARC is connected via eARC. The ARC is hardwired via ethernet to the router.

The issue I am having is that sometimes the sound completely cuts out on the ARC. This is - only - happening when using apps like Netflix and Kodi. If I switch to TV the sound returns but stays away if I go back to Kodi or Netflix.

I followed two approaches in solving this, both not guaranteed to work, and it is very annoying if you have a wife looking at you with that typical look ‘why did you have to replace the device when the playbar worked flawlessly’ … and I can't blame her. 

1st workaround:

1. I rebooted the TV completely and the sound returned. This worked once.

2nd workaround

1. I had to switch - via the Sonos app - from TV Sound to playing a song from Spotify.
2. When I then played a movie on Netflix the sound did not return on the Arc. There is also no way to manually force the Arc via the Sonos App to use the TV Sound again.
3. I then selected TV in AndroidTV and the sound returned again.
4. After that I selected Netflix again, and also there the sound now returned here as well.

I never rebooted the Sonos Arc. So something is really not working well and I am not sure if this is related to the Sony A9G or the Sonos Arc. Anyways it really damages the overall user experience of the product.

What is not helpful either

• There is no way to reboot the Sonos Arc from the Sonos App. My cables are nicely tidied up and put away so unplugging the device is not an easy task.
• There is no way to force TV Sound from the Sonos Arc, after you selected a song on a music service like Spotify