I've recently started noticing a sporadic single popping sound coming from my 2020 iMac that sounds like static. It seems to happen most after the screen has been sleeping, which leads me to think it has something to do with some expansion happening inside the case as the computer gets warmer. It's not terrible, but it is annoying. I've never had anything like with any other iMac before. Has anyone had anything like this. Any suggestions?