Built in fonts don't show up / look invalid in font settings

Inter, the default font is fine since Obsidian Release v0.15.7 (Insider build)
Yet, some built-in fonts (e.g. Source Code Pro) show up in the font list, and work when set but are shown as invalid:
And others (e.g. Avenir Next, and less relevantly, Flow Circular) also work but don’t even come up in the list.

The same bug occurs in 1.1.8 still. Why was it moved to the bug graveyard (yet it’s still tracked)?