Emissive glow on certain mobile devices has visual artifacts

I’m having some trouble with emissive glow on certain mobile devices. Basically, I have a level selection map with a bunch of icons on it. I added a duplicate icon behind them with high emissive (30, 30, 30 for rgb) in order to ‘fake’ a colored outline on the icon. On some mobile devices, however, the glow has jagged edges and weird lines, and doesn’t fade out like it usually does; it also seems to bleed through the icon in front of it in certain places. This only happens somewhat in other parts of my game, but not as prevalent because the glow is not as strong. Here’s an example of what it’s usually like:

And here’s the mobile one:

Usually one is behind the other, but I offsetted them just for testing sake. I’ve tried different things; enabling high precision for mobile on the material, separate translucency for mobile, and changing r.BloomQuality to 1 and then to 5, but none of these changed anything. From the looks of it it seems like some sort of problem with depth buffer precision with the emissive color, but I’m not sure.