As Ratchet said, you never killed Revan in the Foundry. He simply used the Force and escaped to wherever. Would be kind of stupid if a group of 4 ~lvl38 whelps killed someone who's a master of both light and dark side.
I've had ADBlock for ages now and this is the first time it's affecting CH in this way, IF it's ADB affecting it in the first place. I also have Ghostery and DoNotTrackMe but the website never acted like this.