low bandwidth streaming (Windows 10)

i keep having problem with the map rendering in and if i stop and wait for like 5 secs it renders and i can continue to drive !
Running forza horizon 4 on high settings atm because of this problem, priority of the game is set to higher then normal.
any tips ?

specs :
i5 6600k, 16gb ddr4 2133mhz ram, and gtx 1070