If you want to get the FA icon for Patreon without it trying to turn the code into a link to Patreon, just use :_Patreonicon: instead of :Patreonicon:
Starting a link with ":pa" activates some weird Postybirb code that thinks you're linking to a Patreon account. But adding the underscore prevents that, while allowing you to insert the icon all by itself.
The Vulpine Club is a friendly and welcoming community of foxes and their associates, friends, and fans! =^^=