How do I fix this weird mesh loading ?

Hi, Im using UE 4.10.1 and I have a problem with my Blueprint classes.
I habe only a box/ Cube in there, but many of them in the level (it gets weird at 50) .
If I turn arround they plop in, as if they were spawned.
Should I add some kind of pool to safe theyr “render-data” ?
Please let me know :slight_smile:

Ps: It’s the same on smartphone …