Huion Tablet freezes on annotation

When I start a meeting, share my screen, or use a whiteboard, I use annotation. However, when I try to use a different color (Format), it suddenly freezes. The 'pen' tool is moving, the camera and the meeting are still in process, but I cannot quit Zoom in any way.  I used a Huion pen, 

I cannot even use Task Manager because the pen is just wouldn't allow me to click outside. I literally have to restart my Windows 10 and log in again.  

Thank you.