Hello Happened a few times now, i've been driving along, all is well. ACC on with 3 blobs below it. All of a sudden they disappear. Pressing "set" or "resume" leads to 3 beeps and the word "OFF" flashing up below the ACC. I turned it off and on again, no good. I stopped and cut the engine, still not working. It randomly started working later on! What do we think?