What is this?????
A new warning appears during the flight:
Remote controller right dial locked. lightly press it to adjust

Did you press it, and what happened next? Also, it would help to know your setup: P4P or P4P+, in case of P4P what OS are you using and tablet/smartphone you use...

I've always had that. Pressing it once toggles to ISO, Pressing it again Toggles to Shutter Speed, Pressing it again toggles to F.Stop. Once the setting is highlighted Blue on the screen you can then adjust it with the dial. At least in my case. Your setting may have defaulted to something else but I get that message if I don't press it before trying to adjust camera settings.

P4pro iPad air2

It's there to keep you from changing your photo or video settings unintentionally..

No one is questioning the functionality - but the warning message that keeps popping up on screen telling us!