I think according to .discourse-compatibility you鈥檙e pinned to an older version of the plugin, right? maybe a compatibility issue with older versions of Discourse? discourse-fontawesome-pro/.discourse-compatibility at eb39fb6bdc567b77a54ce50366b804c9971467e2 路 discourse/discourse-fontawesome-pro 路 GitHub
I wouldn鈥檛 expect removing a reference to a single icon to break unrelated icons 