[28-Jul-2019 11:37:05 America/Vancouver] PHP Warning: vsprintf(): Too few arguments in /usr/local/etc/inc/util.inc on line 986
https://github.com/opnsense/core/issues/3604
See Francos comment mid way down. I believe you also use the dhcp6c Send Solicit option which means the ISP does not advertise a route. Causes the gateway to be not fully operable in 19.7 so dpinger does not start.I have this issue on one of my connections