Firstly, I'm really pleased to have found Rotor, thank you. I've been using pstrotator on a Windows VM but I'd much rather use a native macOS app instead.
I've spent some time this evening playing around with automation via WSJT-X and all is working well apart from one thing. The pointer on my azimuth window hasn't moved away from North.
I can click in the window, the rotator turns but the indicator just doesn't move at all, it just stubbornly sits there.

I'm using a Yaesu G-1000DCX with an ERC-Mini DX and the computer is an M1 Mac Studio Ultra. I've selected the GS-232A protocol.
Have I missed something really stupid in the setup?
Thanks.