Character keeps vanishing if i run north west beyond the desert

I have a problem with my new project file, i am creating a land scape, and i have this problem whenever the character runs north west corner it vanishes and you can still see the game is playing but you carnt move and the char is gone. Also when i tried to posittoon my start being this point and hit play the character never appear and the camera appears like south about 10000 units away

size of your map?
Also, X Y Z of your map?

Location 393115.0cm x axis. Y axis -1056672.0 cm Z axis -5783.0cm and the total map size is about 3km squared in character perspective, so the character would fit a cross it length ways 1650 times coz char base size is 6 Ft and the map is 10000 ft

Go to World Settings and check our “Kill Z” value. It could be that you just happen to be hitting that limit.

Thanks i discovered the problem, turned off still in world checks, you see the character was going far to the x axis and it was turning off so i turned off that boundary