Canvas Particle System is not showing up when building and running solution

I'm not sure what might be happening and I'm hoping someone will have some suggestions to try. In the game editor, I can see my UI particle effects are working and if I run the game inside the editor, everything works perfectly. If I build & run the game, none of the particle effects in the canvas actually work.



This is a 2D game that is using the UIParticleSystem.cs file from the Unity-UI-Extensions helper project. Attached is an imgur link that shows the settings for my particle system, canvas and camera. I have verified that particle effects DO work if I place them in the game itself and not in the canvas.



I am currently using Unity 2019.1.9f1 if that is helpful.



Any suggestions you have would be greatly appreciated.



https://imgur.com/a/nJPhDmZ

 

[Old thread but useful for newbs to know]
What you are seeing happening is "correct". Particles are not supposed to work at all in UI / Canvas but for some reason they let them work in Editor mode. What you see in builds (aka NO particles) is the correct result.