Clan hall

hi,
today me and my clanmates participated in a ch siege. everything would be ok but i think the instance bug. we made it 2weeks ago and we normal killed mobs and hit raid, now we killed mobs and started to fight the raid but as we started he got some elite type mobs which cloned all time. it was imposible to kill them (immune after few hits) and even tank 98lvl couldnt stand with them not to die in 2seconds. at the end of the instance there were at least 100+ mobs there and noone could kill them. it was such big amount of those mobs that agro/mass skills didnt hit them all. i know mobs can reset - thats why we were all time close with them but for 14ppl entering that siege on lvls 98+ to be imposible to kill the mob ? that's surely a bug, i know that those mobs have a high lvl players defense thats why they hit very strong and got strong p.def but its pointless to spawn 1234567 mobs on a ch siege. 2weeks ago everything went fine and that kind of mobs didnt even appear. now at the beggining was 1mob (the elite type) which came to us all time and went back. from that mob cloned many other. what's the issue ? i think even 99 all 14ppl couldnt kill those mobs and raid. 2 weeks ago there was nothing like that. the ch is "fortress of resistance".

ah and 1more thing, i got some screenshots if needed to prove the amount of mobs before we pred from that siege.

 

same problem in ncwest. we made that instance many times before without problems. and today was something like.. nightmare so probably it's server side bug.