Volume control missing from rooms in new app?

I’m running the latest Sonos S2 update: 80.02.04 Ver.16.2 on iOS 17.5.1. Below is what I see with no missing volume control. Try the following:

Remove the Sonos app

Unplug your Sonos

Reboot your router

Plug in your Sonos wait for all to come back

Download the Sonos app

Select join an existing system.

Also the same problem 2 out of 4 speakers 

Moderator edit: recorded and removed diagnostics number

Hi Everyone

Thanks - we now have enough diagnostics to go on.

Same issue + more. One room has no volume level but music is still playing. There is also a tremendous delay after stopping music, 10+ seconds. New app is very slow with all the elements: graphics, room controls, etc. becoming visible/controllable. I already had an issue with one room, my Arc, starting 20 seconds later than other speakers. Overall not a happy Sonos user right now. 

Moderator edit: recorded and removed diagnostics number

Removing the sonos app and reinstalling seems to have solved the missing individual volume controls

I did that, didn’t work, actually, now I have 3 rooms where volume controls have disappeared.

Thank you AjTrek1. Your solution resolved the problem I reported along with several other quirky issues. I had performed all the steps in your solution except for removing and reinstalling the app many times before. Removing and reinstalling the app was the key. Thank you again.

Any fix on this yet?  Tried removing app and reinstalling but exactly the same. Very frustrating 

Same issue with the (multiple) missing volume controls (x2 rooms). I was hopeful that deleting and re-installing the app would fix as some others reported, but no difference after reinstalling and finally getting the app to find its own system again.

Also, very buggy all around with the new app as many many users have also reported; laggy, keeps losing its own network even though it’s running on other devices (IOs). Completely broken connection to Relisten. As usual I am very disappointed with my expensive, buggy, time-consuming speaker system.