I found out that I had a Boss pedal that could switch from momentary to latching. But it was for some reason incompatible with the pod go. It would always lock out my volume pedal. I bought a cheap dual momentary switch off amazon and have never had the problem since. Really, tested over and over. Same result.
I then took apart my Boss pedal and build my own momentary switch with latching LED lights so I know I've selected it. Yes, it's odd, but it is what I wanted. Works great for me.