Flashlight won't light up certain things

Hi everyone i need a bit of help with a flashlight. I have a spotlight attached though the Character BP works fine. moves goes up and down but the problem is i get black glitches though some textures and all terrain depending on what way i face.

for eg i stand facing north and it lights up the terrain. i face south and it wont light up the terrain but everything else.
I have turned cast shadow offto no luck. any help would be appreciated thanks :slight_smile: