Your problem in not in the Coil Head.
It is in the Bottom 510 Contact pin of the Atlantis AFC section.
Is this spring loaded? May have jarred the spring out of place. You will need to dismantle it deep enough to correct.
Should be fixable.
Good luck!
* As to a broken insulator - unless part of one falls out allowing the center pin to shift against the threaded section or causes a leak(not in the atlantis) it should not be an issue.