Things I have tried
I use option-3 in all other editors to create a hash symbol (#). As you can see, it works fine in this web editor. However, pressing opt-3 in the Obsidian editor on my Mac gives no result.
I checked that vim key bindings are off.
Shift-option-3 does work in the editor; produces a ‹ symbol.
Not sure if it’s relevant, but opt-2 doesn’t give a € symbol in the Obsidian editor either.
Option-f does produce the class Mac ƒ symbol.
I’m rather stumped. I’m pretty sure that it was working recently; I’m wondering whether it might be connected to a plugin. Has anyone else seen this symptom? Can anyone suggest how I might fix it?