The Infitech mdpack maker could pinpoint the reason for that at Extra Utilities. https://github.com/rwtema/extrautilities/issues/671
Seems like this used to be a thing in gregtech back in 1.6.4: http://forum.feed-the-beast.co…up-sound-fix-1-6-4.32126/
Are you sure you didnt reactivate it some how blood asp?