Touched values go to Zero???

I have selected fixtures and then hit the "touch" button on the right hand screen on a RoadHog 4 Full Boar (3.8.0 b1577 loaded). The values for the fixtures all go to zero rather than retaining there current values. What would cause this? I am not holding the Pig or "." button or anything else. I have run the diagnostics check to see if a button was stuck but everything seems to be OK there. I have unplugged my external keyboard also with no better result. I reloaded the most recent OS with no different result.
Any help would be much appreciated. My email is slockwood@suscc.edu