Big teleport problem!

hey guys, i really hope someone can help me out in this. I have been struggling with this for months, and it seems that nobody knows how to solve this!! The problem is that i cannot teleport on certain objects. In the youtube i show it. The navmesh is nice and green, so its supposed to work.
The same object when i put it in the level works, as a static mesh,… But when i spawn this same object during the play, then i cannot teleport on it!! So i think its got to do with a kind of updating-the navmesh-problem, or not? :rolleyes::smiley: