if its only the whites then sounds like you have a storm set that you are not aware of, if it was the profilux it would effect all channels. Other than that bad input on the ai side.
next time it does it unplug he input and plug it back in, if it stops its a bad input connection, if not then double check all storm functions.
Please email us for tech support also, if I was not online you would not have got a reply, however email is with me most the time (other than tonight in about 7 minutes!)