Hello Peer -
You're welcome.
And I would say that indeed, the issues I've had when using MOI on the mac were only related to scroll zoom with a mouse. As far as I can recall I've had no issues related to camera rotation or panning, but I'll double check.
All that said I could very well run some tests with a tablet too, to see if I am finding anything. I only have wacom tablets at my disposal though, no Huion.