Wow! That certainly is an anomaly.
My first thought is a power supply issue…try getting power from a different source.
Something else to check for is microphonic components. With the Quaverato plugged in to an amp, tap on various components on the PCB with a (non-conductive) plastic pen or something to see if you can hear ringing.
Has it always done this or did it start recently? Have you tried unplugging your guitar from the cable to make sure it’s not somehow the guitar? Just to be safe, have you tried a different input cable?
Keep me posted.
-Brach