Enable expert settings and use the shader editing tool, step through the shaders in “Hide” mode until the crosshair disappears. Make this shader active and try the different settings below, probably “HUD”, “No Transform” or “No Stereo” should fix that. If you are unlucky, the setting effects other objects too so you have to go through the other settings as well until you find one about suitable for all of them. If you play the game in cinema mode you can also try “Focal Offset” on the 3D settings page, slightly changing this may help already.