ppp-linkdown uses /32 for $3 which already has /32
In this changeset an error was introduced:
At least on our installation, $3 already contains an IP with /32 which makes the additional /32 unneccessary and breaks the pfctl call.
Unfortunately fixing this still doesn't fix out issue (Asterisk behind pfsense fails to re-register after a WAN loss until state is reset).
I wanted to report it nonetheless.