You gotta be kidding me. I don't know what triggers the "rearrange icon" function, but it gets triggered so frequently, and every time it gets triggered, my MAC is just frozen for 10 to 20 seconds, and I cannot do anything. That is so dumb.
When the "Hide Menu Icons" is turned on the autohide feature of the Mac OS Dock can get stuck. Although it's difficult to make this happen consistently, I have posted 3 screen captures in this Stack Exchange post.
If you view the above, you will see that the Dock gets stuck (1) when the Hide...