Yeah, after keeping a list of servers that were bugged and only going to ones that I haven't seen yet. I was able to get it on 54.90.170.51.
Some things I notice:
* if the chests are spawned already in Renyak, it will bug out where everyone gets kicked out mid fight and can't get back in. Try to find a new instance if you see this.
* if the timer starts at 0:00 for the setup to attack Renyak, it will kick everyone out and lock them out. Scramble to find a new instance, if this happens.
* Most likely if the status (before the pre) of the map is Renyak has been successful, it failed the last meta, so maybe find another one.
* I've seen an instance where the status is something along the lines of the pact has successfully defeated Renyak, bugged out at the boss fight.
* Daily reset doesn't seem to reset the bugged instances.
* The status where it was successful for me, was something about the Aetherblades has fortified. But I also been on bugged instances with that status.
The cannons seems to be bugged forever on the same instances, so if you find an instance that's bugged, just save yourself time and never do the meta on it. There also doesn't seem to be a reliable cause to the cannon bug. I've been in instances where we used turtles on cannons and it didn't bug the CC bar, leaving the platform flying to the cannons early also doesn't seem to cause it.
It seems like some kind of state gets stuck in the instances and it doesn't reset. Good luck to anyone that needs this meta, my only suggestion is to keep a list of the instances that failed on you and find one that you haven't been on it. Maybe if people want to organize it, they can try to cause a new overflow if they are stuck on bugged instance.