I'm having a weird problem with a Matryoshka pedal that I'm looking for some advice on. When I connect to my amp through an active DI box, which is powered by phantom power from the desk, my Matryoshka just produces white noise when engaged. This doesn't happen when I DI from my amp, so it's something to do with the DI box. I'm thinking maybe it's a ground loop issue, but the ground lift on the DI is on. The Matyoshka pedal is powered using a Diago powerstation, with a bunch of other pedals on the board.
Anyone got any ideas what's going on?