I can reproduce a problem with cadence data not transfered, saved on Fenix 5xplus from my eBike running a Yamaha PWX Motor. It did send combined power/cadence data via bluetooth till 3.21. After updating to 3.52beta or 4.2 cadence showed 0, now i went back to 3.21 and cadence works again. Fedback and fit files were sent to Beta team.
I have a stages gen 3 left side power meter, works fine with watch, cadance power etc, before the 5xplus I had a 935, no difference with the power meter, one thing though , it will work with bluetooth but I prefer ant plus connection as I can calibrate power meter with ant plus but not Bluetooth, this was the same with my 935.
???????I have same issue. Fenix 5x plus. 4.2. Stages Gen 3, bluetooth connection, no cadence data. I can't even see a ant + connection option. Are you able to see an ant+ option as well as Bluetooth?