Vortex Sound Research

So I just bought a Minilogue xd yesterday and I'm loving it. But I'm having a weird issue where if I have the cutoff turned all the way down and play a note, I get a strange sort of feedback, that sounds like ground noise. I have the master all the way up, could that be the issue? I'm also new to hardware synths so I'm not sure if this is a regular occurence. I've recorded what I'm talking about here: https://soundcloud.com/joy_key/problem/s-eqNKG

It's very annoying when recording, because I like to start with the cutoff down and slowly turn it up.