I have been using the PCB 10 for about a year now and I have had this intermittent issue with some of the loop buttons not engaging . We have (2) PCB 10 controllers, one on the main pedalboard downstage and an additional PCB 10 living offstage in guitar world that is attached via midi to help assist with switching . What happens is sometime times a loop button will not turn off on the main pedalboard , but the PCB in guitar world will be able to turn off that particular loop button . I have had almost every possible combination of what controller can turn on and off a particular loop . My first reaction was that it was a faulty button / switch , but after testing the switches everything looked ok as far as that goes . What seems to work is to unplug the power on the pedalboard and re boot the PBC with everything plugged in , but I can't keep doing this to clear the issue . Does this issue have anything to do with having 2 PBC'S running together? Could it be a firmware issue ?. Can anyone help with this , I would greatly appreciate any feedback . Thank you