I'm coming here to add to this conversation and say it is not all ARM Macs. I have an M1 iMac (first gen) where I never once experienced this issue, and the keyboard I am having problems with now on my M4 was always plugged into one of the two Thunderbolt ports on the M1. Now that I've upgraded to an M4 iMac, I absolutely am having this problem with my wired mechanical keyboard, and it is utterly frustrating. The fix isn't to just unplug the cable from my board, I have to unplug the cable from the iMac. Sometimes it is only an 'upon wake' problem, wherein the keyboard will make the iMac wake up, but then the board stops responding; other times I am literally in the middle of typing when it seizes up. The first time it happened, the RGB lights on it froze while lit and then the keystrokes stopped sending anything to the iMac. Otherwise if I'm in the middle of typing I'll see that the letters stop appearing on the screen but my fingers are still going (touch typing ftw), and I'll realize the board has locked up... Also I've noticed some lag when typing on my mechanical board, which I don't see when using the Apple keyboard via Bluetooth. I do also have an X10 Crucial SSD drive plugged into one of the ports, and it doesn't seem to experience the issues as much? It may have had a problem once where it locked up the computer to the point I had to reboot, but fortunately (and knock on wood) that is only time that one has had an issue. But the keyboard is almost daily at this point. I do charge my AirPods on cables plugged into this iMac, but whether or not they're having issues while that is happening is not as obvious as it is on a keyboard, so I can't say to whether anything is going on with those. I've also only needed to use the iMac to charge my phone once, and I didn't see anything out of the ordinary then. But I also didn't know to be watching for anything weird until now. TL;DR - it is my experience that it wasn't all M1s, maybe only the higher powered ones, and I am 100% seeing the same issue on my new M4 iMac. Extremely frustrating. What the heck, Apple??