Encountering the special invader won't be able to clear the dungeon.

[atom100]

I've encountered it 3x before the patch and 1x today. after clearing all the monsters from the special invader and monsters from dungeon stage , door won't open or portal will not appear so unable to proceed to next stage. The only choice is to return town. 300 ftg. is wasted. Anyway sealed blood moon jade is a source of gold for many.

[ezrulsio]

I had similar issue as well, specifically in Flame Canyon stage.

[atom100]

It seems all dungeons are bugged, I encountered it in chiron beach while doing the mission box, Red lotus palace garden few days ago and just few hours ago in Red waste. of course different characters of same account.