I've sold two BM's before because of the same issue. I was told that there'll always be noise with high gain pedals but its not feedback or compression its an overtone of some sort. Well, it may be because they were 2nd hand and worn or something but once your ears tune into that extra frequency, its really hard not to let it spoil what you're doing. TBH, as soon as I stopped using a BM it cleared up my sound a lot, which was actually what I was after. To my ears EQD have this with their modulation pedals to but its a sweeter (definitely more usable) overtone and a positively eerie.