P3D v4 Effects cause flicker in a distance

Can someone help me with this? I added some dynamic light effect to Sidney Schwarz´s lamp post. It had spot lights and or lights but they did not have an effect on the ground on P3D4.5. So I attached a dnymic light to it. Usually it works well. Now I have a lot of lamps on the airfield and when moving around, the lights at a certain distance make big squares into the air, kind of pixeling, like we know from pictures where people are hidden behind pixels.

I made a video of it for better understanding. Video - see right far behind

I tried different .fx setting. Seems not to be related to this. Also removed all other attached effects, to make sure it´s nothing from old stile effects not compatible now.

Anyone has an idea what´s wrong?