Audient iD4 MKII High pitched noise

My Audient iD4 MKII has randomly started making this screeching high pitched noise when connecting anything to the instrument channel. It wasn't there one day and was there the next. Thse noise is coming straight from the interface, it's there even when using the builtin input monitoring, so it's not something coming from my PC. I've tried using a different usb cable, different instrument cable, different instrument connected to it, just the cable itself (makes the usual noise you'd expect from a disconnected cable + this high pitched noise). I've tried updating the firmware and it was already updated, I've tried plugging it into the wall with a phone charger and it makes a 50hz hum + this noise. Basically it's always there no matter what I try.

This is the noise