Thanks, at least I know I'm not alone.

I wonder if using Poser 12 or upgrading to Windows 11 would fix it.

My Huion is not my primary display. My primary display is a LG doubleheight monitor, so it really doesn't work very well to try and duplicate it on the tablet.

I don't understand why Poser palettes pop up on the tablet, anyway. I've occasionally the problem with other software, but only if I've put it on the tablet. I never put any part of Poser on my tablet.