Many thanks for all the details, yes it seems that Roon is having problems running on certain Android devices, whilst others or fine.
I know Roon’s @support team and their dev’s are on the case.
Fingers crossed for a switch resolution.
@noris Thank you for your response. As you can see there are a lot of users depending on older hardware to control Roon, even though Google isn’t supporting these devices anymore. Then it’s nice to here your team is trying to resolve this.
My Sony Experia Z3 compact tablet (SGP612) doesn’t work any more with build 521, but what’s even worse for me is that my Windows 10 (build 1909) doesn’t work either!
So I have no proper remote controls any more, Build 511 on the remotes worked perfectly with the build 521, but the support refuses as a policy to make the build 511 available as a rollback solution.
I’ve learned my lesson and will keep installers for every build so I can rollback myself or I will switch back to my Euphony Stylus 3.0 player instead of Roon. Euphony is really great and sounds better than the Roon, but I use Roon for the multi room feature, but if the issues keeps going on I will scrap Roon. Unfortunately I recently renewed the Roon subscription.