lord system is very buggy

[SmallLars]

sometimes when i try to kill a lord in the dungeon and do some hits,
the lord hides from one moment to the other.
i dont kill it and the lord npc still tell me that the lord is on this position.
since the last ~ saturday the rabbit lord (south west) and the mushroom lord (north west) are stuck.
and btw. the north west position and the north east position are the same (forest antrance), this is a bug to ?