Hi @NigelDESelectrical , to summarise:
To summarise the results of our investigations. The model of GX that you’re using is a Color Control GX: we recommend to roll back to v3.55 and keep it at that. The new v3.60 is not suitable for a CCGX in some systems, unfortunately.
With regards to the relays on your GX: they work. The issue you’re seeing is that, when running v3.60, it takes a long time (several minutes) after boot before they become visible. And when in CPU overload perhaps / apparently even longer. As you reported it took several hours and then still not visible.
Have a good weekend and thanks again for posting here, this helps - also for some future improvements.
Matthijs
ps. more info on CCGX and v3.60 is here: Color Control GX automatic updates back to v3.55 (no longer v3.60)