Unable to spawn on Landscapes

Hi! I’m having a problem in Ark Editor, however, the ark community was unable to figure out my problem, and I am using a completely empty level, no Ark blueprints, meshes, truSky, or anything that can cause interference.

I have 4 sub-levels, each sub-level has 4 Landscapes. Since they are high quality maps, I’m using level streaming to optimize performance. They are all arranged, their Phys material and Collision is set, however I am unable to spawn. Well, besides Landscape2.
After I click on ‘Play’ (with a Playerstart positioned), or click on ‘Play from here’, I start to fall out of my map, but on the Y axis. From left to right. On certain areas of Landscape2 I am able to start the game and spawn, and even pass across the other landscapes. But most of the times, not even that works. And the rest of the map absolutely doesn’t.

Is this just an Editor-thing, or am I missing something here?

Ark Dev Kit is currently at version 239.2 and as far as I’m concerned it uses UE4 v4.5.3

Thanks in advance