World partition, game freezes when going far

Hello,

Im facing an issue with big maps world partition,
The player gets stuck when going far away from spawn point.

Demonstration video below

Whats causing this?

Engine: 5.5
Streaming pool: 8000

Pc spec:
3060 gpu, i7 10700f cpu, 64 gb ddr4 ram

hello again,

i know now whats causing the issue but i dont know how to fix,
possessing a new pawn is the issue.

as video above shows, when the car is set as player start it goes far fine, but when i possess the car by character it freezes.

pic above shows what happens to player character, it gets attached to car.
i even tried deleting the character after possession still issue persist.

this issue happened to me also when i created a new project.
if you want to recreate the issue:
1- create 3rd person template desktop high.
2- add vehicle template.
3- make new open world empty level.
4- make landscape like below pic.


5- add to 3rd person BP in EventGraph like below

6- add to sportsCarPawn in EventGraph like below

7- add playerstart and sports car BP in scene the corner of the landscape.
8- start play, move a little, then press E to possess the car, then head to the middle of landscape, then the game should freeze like what im facing.