> Windows … come up behind others when previously they didn't.
m1 16" MBP here, this happened to me on the last OS version too. Still happens on Sonoma.
For about 1 year (a few years back) I had an issue where on my three external Samsung monitors (all in portrait orientation) there was a strip about 4cm all across the bottom of all of them, and up the right side of the right monitor where the mouse wouldn't go. Apple couldn't work it out, spent hours talking to them about it. In the end an OS update fixed it.
m1 16" MBP here, this happened to me on the last OS version too. Still happens on Sonoma.
For about 1 year (a few years back) I had an issue where on my three external Samsung monitors (all in portrait orientation) there was a strip about 4cm all across the bottom of all of them, and up the right side of the right monitor where the mouse wouldn't go. Apple couldn't work it out, spent hours talking to them about it. In the end an OS update fixed it.