I use a Mission EP-1 Expression pedal and a TRS lead to connect it to Remote 'pedal 6' connection.
For the last few months I've found that it stops working out of the blue for no reason.
I have it set to control morphing ( volume usually ) in my main bank of sounds. Its a bit of a pain because suddenly you have to bend down and unplug the pedal then plug it in again to get it to work.
I've tried a couple of different leads and it still happens.
Anyone else have this issue ?