So my Helix LT often reads a flat D note right before playing a note or when touching the strings near the pickups, I can also trigger this issue to show by unplugging the input cable while the tuner is on, this has only been happening since I updated to 2.70, if I roll back to a previous update, this doesn't happen. Here's a picture of what I mean     Can you try on your Helix and see if you have a similar thing? Would a Furman Power Conditioner maybe fix this?