Had a weird issue at rehearsal. Using Helix, JTV69 with VDI cable to change preset guitars, tuning, etc. (Queen show). In the middle of a song my tuning changed. Thinking it was mechanical (using trem), I tuned my low E back to pitch...(went to C#). So after song, I moved the tuning switch on the variax and it didn't change any tunings. No tuner either, so guitar was not hitting Helix, I think. So, I unplugged the VDI from variax and plugged back in...It reset and all was good, except it changed my volume and was really loud. So before I start my troubleshoot, any clue from you guys where the issue might be? Hoping it is just the VDI cable (although it is pretty new). Debating about using regular cable with battery and programming the Variax and make the model changes manual instead of Helix...but It always worked so well before (podxtlive, X3, HD500). Hate to loose that functionality. Oh, this happened to me on the last gig I did with another project on the last song too. Any advice? A little unnerving.