Bug 2D Spotlights flickering depending on camera position?

Hello there, I have a problem with my light setup for my project. It is best explained in the video below:

Basically I have 2 Lights on every Obstacle. One for the foreground and a background light. For some reason when moving the camera in certain scenarios and only certain positions the lights start flickering. In the uploaded image is my Lighting setup. I enabled alpha blend cause often some lights overlap when the player moves on them and I dont want the light to get too bright.

What could be the cause of this? Any way I can fix it? Is it maybe because of too many lights or them overlapping?

I appreciate any help alot! Thank you!