FleetingNotes is an interesting idea, which I support, however I do find the syncronisation can be clunky at times. I have set-up an account for syncing purposes, which does seem to work well between this add-on and the Android app. But the synchronisation with Obsidian itself is sometimes problematic. I just had to delete and re-install the Obsidian plugin, which seems to have fixed it for now.
