This conversation has been merged. Please reference the main conversation: Photoshop 21.2: Moving layer leaves duplicate/shadow image
If I duplicate a layer, for example, and change the opacity on the top, or I apply a mask, or move it, then when the layer is turned on and off, the image contents are not displayed correctly.
For proper display, you have to turn off the visibility of all layers and turn it back on from the bottom in turn.
This makes it impossible to work.
Windows 10 x64 Pro.
Disabling GPU usage does not help.