Thanks to all those who have been looking into this issue! I have done some more testing and have come up with an idea of what is happening in my particular case.
I'm using a 4K monitor and what I've noticed for a while is that the Mac seems to be handling the 4K monitor as if it was four 2K monitors. Examples of this behavior is that if I put the Mac to sleep and later wake it up, windows that were full height on the monitor are now half height. This applied to Music, Safari, etc.. I don't recall if the width changed as I seldom need the windows to be wider than half of the screen.
What I finally did that really showed this might be the cause of the issue is I moved all the icons on my desktop other than the single, far right column over to the far left side of the screen. So my screen had a bunch of files and folders on the left of the screen and a single, full height column on the far right of the screen and started some testing:
1) When I put the Mac to sleep and woke it up, the drive icons moved.
2) I moved all the none drive icons to the left half of the screen, put the Mac to sleep and woke it up, the drive icons stayed where they had been.
3) I started moving files from the left to back under the drive icons, a couple at a time. When I did the sleep-wake cycle, the drive icons stayed where they were - UNTIL I had file or folder icons extending below the top half of the screen!
Eureka! :-)
With the grid size I had selected, I was able to have 24 icons in a column. When there were 12 icons in the right column things stayed put. But if there were 13, the very top drive icon would move. If there were 14, the top 2 drive icons would move. Etc..
So my conclusion is that there is a problem with how either MacOS or the M2 graphics system is handling a 4K screen. I need to do some further testing comparing how my M1 mini and M2 mini handle this issue. But I'm currently on a trip and don't have either system available to test with.
If you aren't using a 4K monitor and are having this sort of issue, I'm not sure what the underlying cause might be. But I suspect the same sort of thing would happen with an 8K monitor as well, although I have no idea if it would happen with a column half the height or a quarter of the height of the screen.
By the way, my 4K monitor is just a 42" diagonal 4K TV monitor, not specifically a computer monitor. The reason for that is that with my eyes, I can actually use the screen without my reading glasses if I'm more than about 3' from the screen. The monitor is mounted on a corner countertop as far back as it can fit and that works out to let me sit normally and be just a bit more than 3' from the screen so my 71 year old eyes don't need my readers. :-)
Lew
