Almost certainly something I'm doing wrong but .... reaching out for ideas please.

Guiding was working with this rig/mount/cameras under 3.6.1

Update to 3.6.2 and all works except guiding. I have the guide interface, select the right camera. Capture an image OK. I select guide and the activity indicator spins, the Prep yellow light goes on and a few entries in the log fie:
Autostar selected
Calibration started
RA Drifting forward

No plots appear in the charts and nothing seems to move. The attached logs are provided.

I must be doing something wrong but I can't see it. Shame to lose tonight if I can't fix it.

Rig is a Skywatcher 150PDS / ASI 183MC Pro main and ASI 120MM-S guide, 50mm guide scope, all on a HEQ5 Pro.