Comment 2 for bug 1861338

I don't have another usb3 one at the moment, I'll see what I can find. However, I'm also starting to think it may be RF interference from the usb3 port and or stick. If I grab the rpi4 near the usb/ethernet block in the right place, the problem seems to go away a bit. possibly something similar to the known issues with hdmi at certain resolutions jamming wifi?

I've tried with two different access points, both in the same room so I'm plenty close to have a strong signal, and I see this happen on 3 different rpi4 devices (1,2,4GB).