Donald,
In your 2D settings, have you enabled 2D acceleration (OpenGL)? If so, turn it offf and see what happens. There is really almost no advantage to enabling OpenGL in 2D ... and it could be that there is a problem there that is causing what you see.
In 8.1, this was a Preference. In 9, this is in the Work Environment under 2D Redraw Options. Make sure you have not checked "Optimize drawing method for high performance display". (Or, what the heck, if it isn't checked, try checking it and see if that helps.)
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB