All I need to put is the images and you can see for yourself…
The game in editor play mode:
The game in build:
In the game the particle system is always in-front of the camera, regardless of where the camera is. The particles are in world space and positions are set manually via script.
Any help or suggestions on a fix for this will be greatly appreciated.
I should clarify, what you see in the build are not particles but are sphere meshes, for close up suns.
From my personal experience I’ve only been using unity for a couple months but particles don’t play by their self in editor mode you have to press simulate for them to play in editor and when you enter play mode they auto play
I’ve found a “solution”. Abandon this buggy particle system and use the legacy particle emitter. Works easy and no performance issues from using it.
The issue with the new system is the messed up culling of the particle system, even if all settings have culling of it disabled.
Here’s the final product, in build. My infinite space looking good now 
With subtle Post Effects
You seem to be answering a different question ZeaVillain, I’m seeing the same issues.