The thing is that if I move the track time ruler over 2 samples to the right , hit play , then the issue happens on different samples , so it can't be extra lane with out of phase .
I have this lane stripped down to just solo and master out , when I remove the gain automation ,the problem goes , when I move the middle node up level with the second node it also goes away .
Anyways there are strange things that happen every now and again , on my PC, sometimes I wonder !
I will just use a less steep middle node I guess !
Thanks