Not really clear what is happening. A few questions:
1) How do you “engage an effect” ? What does this mean ?
2) When you are not hearing an effect, is the bypass light on or off ?
3) Where is the signal coming from ?
4) Where is the signal going to ?
1 standing left hand or centre footswitch to turn an effect on…
2 what is a bypass light?
unit is in effect loop
works normally about 90% of the time