It sounds crazy, but it is possible that the start-up of a refrigerator compressor causes such disturbances. I have exactly this sporadically at home. As soon as the fridge compressor starts, the light on the monitor goes out for about 2 to 3 seconds and it can also happen that devices on the USB port lose the signal, but then get it again a few seconds later. It doesn't happen all the time, but it happens to me all the time (there is also information on the internet that this is a relatively common problem).

I have it too, especially when I use the uplink USB2 connector.
With USB-C, relatively few problems.
Reporting it to the manufacturer and searching for a firmware update were unsuccessful.