I was thinking this, but I don't recall it doing it before and when I have it set to a slow sweep it's a good second or two between each time it goes over the edge. So it completely cancels out twice. (I also have the the output of just the left channel running. This gives an even more cancelled sound than just using the right mono, but it does the same thing with both outputs)
Ok, so i just listened to some clips of the TZF Paradox flanger (I couldn't find any of the modfactor set to thru-0) There's one clip of it using a straight LFO (no envelope or attack) and it only crosses over once. If this is the way the modfactor's thru-0 is designed, then so be it…it just doesn't seem right to me.
