Morgasmatron outputs noise on when Overdrive is on?

I got a Morgasmatron a few weeks ago and I get some overdrive noise on the output when overdrive is enabled on Output 1 and on the Mix output, even when all of the other controls are turned down.

Is this expected? It’s not really a huge problem other than when I’m working on the rest of the rack I feel I have to disable overdrive when working or the hissing drives me nuts.

Yes, I get this on my unit too. I think that’s probably normal as many distortion circuits do add noise.

If the path is set to parallel I don’t get any noise if the mix is set to filter B. Is this the same with yours?