The Hidden Forest

Hello,

I have been farming the AA stones in nadox lately and it seems that certain bosses crash the zone. I can expect the Zone to crash on Oligarth at least once or twice before i can get him down. This usually happens on the third version. Thank you !

Is there a specific hp% that you are noticing this at? Or maybe X timeframe after initial (phase 1) and subset (phase 3) engage?

I want to say he is between 75-50% when it crashes as far as time its probably around 3-5min total. I'm not doing anything different then i used to just more dps, and different buffs/procs/skills then back when i used to kill it.