Dynamis Glitch

So my linkshell was just doing Dynamis-Tavnazia and we were having a great run, got I think 13 AFs (a couple of Hydra drops in there too), had about half hour left, when the whole thing just glitched. It because so laggy for all of us that none of us could do anything. Characters would load slowly, couldn't see the mobs, couldn't target anyone or change gear, stuff like that. Of course, the GMs were totally useless in helping us out so the rest of our dynamis was wasted. Anyone else experience any issues?

my last dynamis tavnazia run went well, without any glitchings beyond normal "i've got 18 people and 72.54 monsters active on my screen" lag