Mausberry Circuits Switch and Noise

I’m not sure if anyone else is using the Mausberry on-off switch attached to their Raspberry Pi. It seems to work fine most of the time for turning the Pi off having followed Thanks for that.

However I’m noticing what sounds like electrical interference noises when the switch is attached to the micro usb power socket. The GPIO connections don’t seem to make a difference, Has anyone else had this issue. I presume that there is little that can be done about this, but if others are experiencing little degradation it would be useful to know.