novnc screen's scroll bar blinking on Windows 10

[ribbon]

Using Proxmox VE 5.2, when I display the VM novnc screen, the scroll bar blinks.
Scroll bars will be displayed and disappear every 0.5 seconds.
It only occurs on Windows 10. It does not occur in Windows 7 or LXDE environment.
Also, it does not occur if the screen size is larger than 1024 x 768.

Does anyone know how to fix it?

 

[altano]

You can make the blinking stop by clicking the noVNC settings overlay and unchecking "Autoresize Window"

 

[dirtbag2k]

You can make the blinking stop by clicking the noVNC settings overlay and unchecking "Autoresize Window"

THANK YOU!!! this has been driving me nuts for years now!!