Based on my testing it appears the reason ccDHD is getting stuck is because the build of SGCraft for 1.12.2 isn't generating some (or possibly any) events for CC - without those events ccDHD has no idea what's going on and won't be able to keep itself in the right mode of operation. Your best course of action, at this point, is to report this to the person who made the build (since it's non-official) and see if they'd be willing to drop another build with the necessary fixes for CC 1.80pr1.
I wish I had a better answer for you. Hopefully, when CC 1.80 official drops, Greg will drop a new build of SGCraft with proper CC support.
Edited by Dog, 10 January 2018 - 03:08 AM.