Ace connection Android

My Sonos Ace Headphones will not connect consistently with the App on my brand new Oppo Reno13 phone. I have retuned 2 previous pairs of headphones with the same problem. The current (3rd pair) at least connected with my Oppo to allow an update but now will not reconnect. Bluetooth pairing works fine, it’s just the app which I unfortunately need to listen to Spatial Audio (Atmos) through my streaming service. It is extremely frustrating as Spatial audio is the primary reason I bought the headphones. I have the same problem on my old Oppo phone and also a really old Samsung S9. I have tried everything suggested in similar threads such as re-pairing, factory resetting the headphones, clearing the cache, rebooting the phone, tried Sonos support 4 separate times and all combinations of the above. The only thing I haven’t been able to do is connecting via an iOS device as I don’t have access. I cannot believe that I am alone in this problem with Android but all I can find online is people with Google Pixel connection issues from a year ago and 1 review from June referring to this issue.

Otherwise I love the headphones, they are really comfortable, battery life is excellent, they sound great in Stereo and they are said to be the best performing for Spatial Audio……..if only they’d bloody work.

I am so tempted to send them back for a refund and buy a pair of Sony or B&W but I have invested so much bloody time on the phone to support and don’t want to spend an additional $200 when otherwise the Ace seem to be a good product.

Anyone got any suggestions?