Yep.  Volume control still all f'd up.  You would think that would be the easiest one to fix, but it is terrible/laggy/unresponsive on my system. Never had even one problem before the app disaster.

I’d like to go back to the old app, it was much better, does anyone know how to do it? I have different devices showing different songs playing, when we can all hear the one that is actually playing, I can’t add a whole genre to a playlist any more I need to use the PC to do that, its not intuitive like it used to be. Can I go back to the old one?

Most often, delays are caused by network issues, between your controller and router, or router and the speakers. I’d certainly check the wifi interference FAQ, as well as performing a Sonos network refresh, by unplugging your Sonos devices from power (or powering them off, if battery connected), and rebooting your router. Once the router has recovered, power back on your Sonos devices. This will give them both a fresh IP address, as well as a refresh of the Sonos OS. Finally, check your system for updates, in case there are any that need to be applied. 

Thanks for kind answer, but I of course checked all of this. PLUS ; only thing that changed before I got all the issues is Sonos App. 
I think Sonos needs to face it: this app is a disaster. I was advising anyone to go for Sonos rn the past but obviously can’t anymore 

And yet, many people seem to be using it without much difficulty. I’d think if it was endemic to the Sonos app, all users, not just some, would be impacted. But I don’t see any numbers, either way, being supplied by Sonos, so it’s hard to tell, other than my own usage. Have you submitted a system diagnostic within 10 minutes of experiencing this problem, and called Sonos Support to discuss it?

There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.