Behringer Cat Sub Octave Glitch

This is a glitch I have found on the Behringer Cat which I purchased today. I bought two units and only this one exhibits the glitch. It's a horrible noise on just one key coming from the sub octave on VCO 2.
I'm uploading this so I can show the vendor the issue and hopefully get a replacement.
The other Cat seems fine, and it's a great little synth.

[@Apeshower]

John, it’s Ian here. Tracking you down old mate. How’s tricks?

[@johnthecloud]

Hi Ian
Doing fine at the moment. How are you? Do you want to email me on the same old email. It's a bit more private than on here.
John

[@Apeshower]

@@johnthecloud will do.

[@Apeshower]

@@johnthecloud emailed with the one I have.