Utilizing Font Awesome's Duotone options (example : fas fa-duotone fa-mortar-pestle ) results in the desired icon being used for the World Codex navigation icons, but is not visible when the user clicks to read the intended article.
(1) find a duotone icon to use (ex: fa-duotone fa-mortar-pestle) (2) edit an article, go to the "DESIGN" tab (3) enter the icon reference into the "ICON" data entry field (ex: fas fa-duotone fa-mortar-pestle ) (4) view the article and observe the missing icon (5) view the World Codex navigator and observe the icon being present
Hello there - I have tried this across all our test accounts and it cannot be reproduced. this looks like an issue with local CSS or some sort of a plugin causing an issue. I would suggest you give it a try in incognito mode and also trying removing or changing your local CSS or Theme used.
Confirmed Reproduction of Bug on certain, default CSS options available through World Anvil. No other setting or customization was altered with the exception of changing the 'Theme' of the World. Tested across the following Themes and encountered this issue occurring on some, but not all of them: ISSUE ENCOUNTERED = Stars ; Galaxy Anvil ; Bright Fantasy ; Spiral ; Scripture ; Rust NO ISSUE = Deadhouse Sonata ; Dungeons and Dragons ; Great Gamemaster ; Modern Spaceships ; These are the Voyages ; Cyberpunk ; World Ember ; Stranger Worlds ; Elven Forest ; Ghosts of Saltmarsh ; Notebook ; Zen ; Devin Rue ; Wild Wild Steam ; Area 51 ... as these themes are default CSS options available within World Anvil, is there a way to fix those particular themes so that it functions as intended or make some kind of adjustment to resolve this issue without the need for upgrading an account beyond 'Master' tier?