I dumped in my LME, and was watching my brew pot like a hawk so as to avoid a boil-over. I got a good rolling boil, foam on the sides but it didn't rise up as I've had in the past. Didn't remove from stove top just let it boil, although I did stir a couple times. Is it really critical to have the "foam rise" for hot break? Or did I have one and not even know it?