Lighting Errors based on Camera Positions

I've got a scene set up in unity that's generally got 1-4 spotlights running at any one time. I'm currently getting a huge amount of strange artifacting/clipping issues with the lighting setup, which can appear/vanish based off the camera position.

Setup is;

* Unity 2018.3.9f1
* Forward Lighting (Deferred exacerbates the problem greatly)
* Lights are all spot, some with Cookies
* Gamma colour space (No difference between Gamma/Linear for this problem)
* Pixel Light count typically at 32, tested at values 1 - 1024
* Tested with no/full specularity & smoothness on shaders (no difference)

Again, this is fully dependent on the camera position as seen in the above close-up - but the problem tends to occur no matter how far away you are from the object being affected.

For example, here is a zoomed-out view of a wall;


Moving in very slightly changes the lighting to;



While moving in a bit more still then removes all lighting reflections;



Changing the angle then, without changing position, results in the blue spotlight glitched reflections returning;



Does anyone have any ideas on what could be wrong here?

 

For anyone else who ever encounters this problem;

It was my own (and now your) fault. Set your Light Cookie textures to Clamp, not repeat. Otherwise they artifact all over the screen.