Random operations

My Cintiq 27 Pro has occasional random glitches, for which I have no explanation and cannot find a cause.

Sometimes the 'Radial Menu' appears, though I never press anything to display it. At the same time, though, the mouse cursor switches to 'Second monitor' mode. I can reverse them by manual selections, so it isn't a severe issue.

Also, sometimes the 'Touch' turns on, even though it's off via the switch and that is set to turn all touch functionality off. I have to turn on the switch and then back off again to remove the touch setting.

Using Windows 11, latest version, and all software and drivers are up to date. Whether it is a factor, I'm also using the Loupedeck CT.

Any help would be appreciated.