To clarify a few things.
- it looks like all the candle flames are rendering behind the objects and not just the one highlighted. Can you verify that is correct? Or is just just a separate artifact.
- as you were able to provide both a functional image and a broken one, what is the difference on where they are rendered? It looks like the working is the scene view, and the broken is the game view. Is that correct, or is there something else?
I did a quick search, and came across someone else running into a similar issue, but with a fix Particles behind meshes? There appears to be a bug when the particle system scale is set to (1,1,1) on order. and any other scale, 1.00001 for each works.
Additionally, it seems unchecking receive shadow on the particles would work. Haven’t tried it, just what I’ve found.