I have had this intermittent problem with RF in the shack. Mainly this was on 20m where when transmitting some digital mode like FT8, the software would crash and the computer would send random serial commands to the radio and just mess things up. Mostly this was on 20m, but also on 15m the wireless mouse would stop working while in transmit. So i had some RF issue happening and by chance I worked out what it was.
Now, for work i spend a good part of my time on a motorcycle out delivering and I like to listen to the radio, podcasts and even ebooks using software that reads the text to me, while i work. I use these cheep arse bluetooth headsets to pipe the audio into my ears from my phone.
It turns out, when i have these plugged in and charging, they are acting as antenna and RF is then being fed into the mouse and keyboard dongle and computer VIA USB and then out the USB to serial cable for the radio’s cat control. Who would have thought that something as simple as USB charging would be the cause of all my problems.
Solution was simple, unplug the bluetooth headsets and everything is tickety boo. Oh and the reason why I have 2 of these, the battery only last 4 hours and 2 means I can work all day and keep the sounds coming. 🙂