Talking about the Enemy Skill learned from Mu's - it turns grants all targets invincible, reflect, barrier and mbarrier.
I am using 7th heaven and downloaded the june 23rd version. Is the bug simply not fixed?
Edit: Saw there was an update(30th june version).
Downloaded the Iro and installed it via 7th Heaven. Quarry Fuse still makes enemies invincible, though.
Edit 2: Tested a few things.
Ran the main installer(on my vanilla steam-file) and tested Quarry Fuse. Works as intended there, but not in the 7th Heaven version.
Completely reinstalled 7th Heaven from scratch. Tested without any other mods - but the issue persists.