I've attached logs, this was for one lockup. It does eventually recover.
stall-2018-05-24_00.36.44.txt
stall-2018-05-24_00.37.16-1.txt
stall-2018-05-24_00.38.18-2.txt
stall-2018-05-24_00.40.19-3.txt
stall-2018-05-24_00.44.21-4.txt
stall-2018-05-24_10.45.01.txt
stall-2018-05-24_10.45.33-1.txt
stall-2018-05-24_10.46.34-2.txt
stall-2018-05-24_10.48.36-3.txt
stall-2018-05-24_10.52.38-4.txt

logs.

Please report to FTB Utilities Github.

Not fixable on a pack level.