Guardian of Stone trap triggered at start of map

[boroie]

Server - 312
Date - 13 July, 12:27 GMT+1
Map - Limbo - The Spawning Stone
User - boroie

I had fought 3 spawns and was finishing off a nishruu that was stuck on a blade. Suddenly the boss trap triggered and wiped my party. 
I had not gone further than the exposed portion of this map. No epics fired, no aoe spells went off. Nothing else was up apart from that nishruu. I have no idea why the boss trap triggered but it clearly did. You can see the red in the screenshot and the logs show it too. 


[CHAT WINDOW TEXT] [Sat Jul 13 12:27:37] Nishruu damages Black Blade of Disaster: 0 (0 Physical)

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:37] Nishruu damages Black Blade of Disaster: 0 (0 Physical)

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:37] Black Blade of Disaster attacks Nishruu : *target concealed: 90%* : (14 + 23 = 37)

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:37] Spriggon casting Greater Dispelling

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:38] The Guardian reshapes Limbo around you, forcing you to him!

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:38] an'Súil casting Greater Dispelling

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:39] Spriggon casts Greater Dispelling

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:39] Nishruu attacks Black Blade of Disaster : *hit* : (3 + 117 = 120)

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:39] Nishruu attacks Black Blade of Disaster : *hit* : (19 + 112 = 131 : Threat Roll: 19 + 112 = 131)

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:39] Nishruu damages Black Blade of Disaster: 0 (0 Physical)

[CHAT WINDOW TEXT] [Sat Jul 13 12:27:39] Guardian of the Stone damages Una: 370 (370 Anarchic)

As this was completely outside of my control, can a dm spawn a p2 key please? 

[kid]

Sorry to hear this as happened to another group! Chub and I have experienced this now for the third time. Our plan of action is that we try to get at least one toon into the boss room with the lead and with a series of miracles to put the party into mass gs. Then we use apports to teleport to the leader. Then we reset and take down the guardian of the stone and deal with the mobs as they pour in slowly to the boss room. It's actually happened at the very start of the map once, seems to be no rhyme or reason as to what triggers it.