For the last week or so I’ve been styling a Discourse setup for a brand which includes fixed fonts, logos and icons.
To begin with I noticed that any assets I imported (place in assets folder and import under the assets object of about.json) became immediately available to use as a SCSS variable but took a minute or two to show up in settings.theme_uploads.
Now however, they don’t show up at all in settings.theme_uploads which means I can’t use them in my JavaScript. If I remove an asset it also stays in the settings object. The SCSS usage stays unaffected.
The settings.theme_uploads data was added to javascript relatively recently (after the OP was written, I think). It should be reliable - we use it in our own themes/components. Can you explain in more details what issues you’re seeing?