Had to investigate this one a little. The solution is a simple fix in the /administrator/components/com_jfbconnect/views/notification/tmpl/default.php file. Around line 128, you'll see:
Yeah, that change is not in 6.0.5. It would be in a 6.0.6 release, should it be necessary, but there isn't one planned right now. The change is very minor, but 6.0.5 was already in testing and we didn't want to restart testing to get this change in, due to it's very low severity.
If you run into anything else, or have any general feedback, as always, let us know!