Roon Remote "Software Update Needed" it's updated

You are running production on the PC and earlyaccess on the phone. That’s not a supported configuration and can break. In fact, it says so right there in the release notes for the earlyaccess build 1292 that you had on the PC:

You need to make sure that you are running consistent versions on Core, any other control PCs, and mobiles - either earlyaccess or production.

The whole thing is described here: