So we're still digesting this, as it's extremely strange. Last night we went in to rock out on Razorgore and had something truly bizarre happen. After Grethok and his two adds dropped, the gate didn't go down...and adds didn't spawn. Now, while I don't have the logs to prove it, our GM was controlling Razor and can attest to the fact that Razorgore was not DI'd (and I'm not even sure that would work anymore).

So we continued to down eggs and then took down Razor. The only weirdness that we can relate is that someone tried to use an MC cap on one of Grethok's adds. When it was resisted, the individual (a pally) DI'd himself. That is all I know. Considering that MC'ing humanoids during the encounter is considered a viable strategy, I have no idea how this would interfere with the encounter in the manner that we experienced.

Shaky details, but I'm wondering if anyone else might have some ideas regarding what happened? Has anyone else seen this since 1.12 went in?

We haven't had anything that crazy happen, but our last three RG kills saw spawns staying up after the transition. Having to burn down a few dragonkin before killing RG isn't that big of a deal, but it was somewhat of a surprise the first time it happened, and it's happened every week since.

^ A Druid tank of ours said that a few mobs were completely ignoring his Growls last night (and not from resists).

We don't bother burning them down. Sleep them again, and when Razorgore next does his fire volley, it will aggro on him. We've had a dragonkin tank him from 70 to 30% or so, made the encounter rather a joke really... :)

When kiting dragonkin I notice the same thing, even pre-1.12. They seem to want to run up to the platform and then select a target. The things you do while they're "distracted" don't seem to actually get their attention, even after they've hit the platform and turn back to the raid. I just wait for them to stop being retards now, and it seems to work out fine.

Yeah, it's always been like that for us too. Gotta let the dragons finish their little chickenhead dance and start moving normally before you can pick them up.

To add to the list of Razorgore phenomena, here's a post I made recently in a Twin Emps oddities thread. I suppose it's no longer off-topic!

Glad to hear that other people had a strange RG. We had trouble coralling them last night, they'd ignore warriors and head right for the platform. Even then they were impossible to target and hit with the incredible lag, it made for a frustrating night.

In my experience, this has always happened - some of the spawned mobs are scripted to run to the orb platform and stand there looking dumb for a second or two before following normal aggro rules. I've seen this behaviour every time I've done the encounter.

As for DIing yourself, the paladin used Divine Shield to cancel mind control, not DI - but I don't think that should have any effect on the encounter - the OP is describing an error in the encounter script I think. Probably just a bug.

That makes more sense. Still, this brings up an interesting question. Was it just a coincidence, or did the mind control actually bug out the encounter? There's already a well-known exploit involving Divine Intervention. So, perhaps a member of the raid getting mind controlled (thus becoming friendly from the orcs' perspective) can have a similar effect?