phone flashes white screen to the left sometimes when on phone

[alexhob123]

when i open up an app or use my phone to do anything sometimes it will keep flashing a white screen to the left like mad and it won't stop for about a few seconds or so is there any way to stop it from doing this think it has something to do with package installer but not sure

 

[alexhob123]

it's like a constant flash of white coming from the left hand side