so i died in the k85 solo last room stage 1 because i had no heal. i looked closer and all the npc`s were gone from the room( they were present when the door closed)! after i died they just apeared! a clan m8 said that the same him happed to him in the last room stage 5!
i`m tank 88.
Welcome to kartia solo world, where NPC's are bugged.
Next time try to get far from the door and use all your survive abilites :). Sometimes NPC's get stuck and they need a little bit more to teletransport.
This happened me twice (npcs appeared after 1 min), but as a healer, I can survive fine until my NPC's come to rescue me :).