Connection Issues Arc Ultra & Sony Bravia TV

I have a new TV, Sony Bravia A95L 55”, initially while I was waiting for delivery of a new Arc Ultra & Era 300’s for surround I used my old setup, Playbar, Sub Gen 2 & 2 x Play 1’s for surrounds with the new TV, Playbar connected via optical cable. All was fine.

When the new stuff arrived I connected it all up, Ultra via eArc HDMI etc, I now have a few issues;

1. Occasional disconnection from the Sonos and back to TV speakers, without me doing it. When I reselect the Sonos, its fine.
2. When I turn on the TV in the morning, by switching on the Sky Q box, more often than not not the TV shows nothing on the Sky Q channel, I have to restart either the Sky Q or TV, then its fine.
3. When I fast forward, rewind or pause on programmes, when the sound comes back I get a nasty noise from the speakers. this seems to be only on Sky recordings and not all the time (see clip)

Any ideas as to what it could be? 😋