I was playing my HX Stomp last night and this happened to me just like the original poster described. The device remained powered but my signal chain stopped. This happened to me a couple times before, twice during gigs! Ugh! However, usually when I power off and back on the unit it is fine. Last night, it repeatedly did this after powering on/off even when I tried different presets that had fewer blocks. I have a big gig this weekend and I'm more than a little nervous.