Accounting updates" is not working in PPPoE config page
For some reason, "Accounting updates" is not working in PPPoE config page.
you should do it manually.
There are two options. the first i prefer, use "Acct-Interim-Interval" reply attribute in your external radius to update user accounting in specific interval.
second option, add "set auth acct-update 330" to your pfsense configuration of PPPoE section in "/etc/inc/interfaces.inc" and "save" PPPoE in GUI.
this line will force MPD to update accounting data every 330 seconds.