Right now I have a meris lvx pedal into insert 1 and my H90 out into fx loop of my line 6 helix. Any time you engage insert 2 which has nothing in it, it starts to feedback for some reason?
In 1 and out 1 of H90 going to line 6 helix fx loop
In 3 and out 3 of H90 has the meris lvx as an insert
exp 1 and 2 are being used as well for expression pedal and a ehx 3 footswitch