This was a big issue for me on my Intel NUC, the wireless keyboard's receiver dongle was plugged into a USB3 port and received lots of interference. Installing it into a 1-ft USB extension cable solved the problem completely.
[1] One I can sometimes trick with a "headless" DP cable, but even that isn't reliable enough to stick in a closet and forget about.
I really love the form factor - about four of these would replace close to a kW-worth of hardware I currently run, and could hide in a closet. Maybe I should try again with known-good versions.