UNREAL 4 - All timelines & many things crash, when leaving the grid "wireframe plane" area, why?

Hi, i created a map that its bigger tan the original grid (wired squared area), to allow my chracter to move in such great map, i created many teleports and also made my caracter move in about 1 second to desired lotacions outside this default grid or working area … as soon as it teleports or moves to a far area, all my “timelines” stop working and also my character dissapears or crashes… it happens in the exact place where the grid ends… why and what can i do?