pfSense » Bootstrap

Browse to diag_logs_settings.php where you have syslog enabled.

Uncheck "Send log messages to remote syslog server". The fields beneath that do something (kind of blinks), but are still shown.

Re-check "Send log messages to remote syslog server", and it hides all the fields as if that box were un-checked. Uncheck it, and the fields are shown again. The behavior is opposite what it should be when you load the page with that option enabled.