opmanager plus blocks syslog for 2 hours after turning on fortigate webtrends

opmanager plus blocks syslog for 2 hours after turning on fortigate webtrends

i suppose that the fact the i've turned on webtrends causing more logs, but these are the firewall logs, so what can i do to overcome this?
                New to ADManager Plus?

                  New to ADSelfService Plus?