The notifications system within Freedombone has been updated and can now send alerts for Epicyon DMs or replies and also will work with the Matrix app.
If you have Matrix installed then notifications will appear under a section called System Alerts within Riot. There is also a bug within Synapse such that if you close the Server Notices room then it won't be re-generated when a new notification happens and the only current way to fix it is to restart the matrix daemon or reboot the Freedombone server. So if you are using the Riot (web or Android) app remember not to close that room.