As you can see on the attached video, toggling masks visibility behaves badly, when GPU acceleration is disabled. (and I have it disabled due to ongoing issue https://community.adobe.com/t5/lightroom-ecosystem-cloud-based-discussions/choppiness-when-dragging-....
After clicking mask visibility toggle, the picture is not updated until I move the mouse over to the name of the mask.
When toggling all masks visibility by pressing and holding the eye icon, picture is not updated immediately on the mouse press or release, and only on mouse move or another press/depress. This renders the exactly opposite effect (when mouse button is pressed down, masks are visible, when it's not pressed, masks are not visible).
Small, but annoying issue.
When GPU acceleration is enabled it works properly.
AdChoices