You might want to ensure that add-on glyphs don't get picked up when AN builds glyph configurations. My add-on glyphs have not-so-functional configurations created in config/ars_nouveau, but if I rely on that then users sometimes end up with crashes.

I don't understand what the actual issue is here. What in the configs doesn't work right with addons?

Core AN nondeterministically may or my not create configs for add-on glyphs under its own folder. If it does, they appear to take precedence over the mod's own folder.

Context: Glyph Configs for addon-provided glyphs only show up non-deterministically.
The suggested fix is for AN to register its configs for addon-contributed glyphs immediately when the glyphs are registered. Which is confirmed safe by the fact that you may declare configuration right at mod construction.