This started last night. I was playing along with my music, using headphones and all of a sudden, the amp did this restart. I got the 4 blinking lights for a few seconds and then it went back to normal, although, not on the preset that it was on. I thought it was just a glitch and went on playing, after I had set the preset and started the song again. After a few minutes, it did it again. Power supply going out? I highly suggest for the next firmware/app update, some sort of function test.