Thank you for your reply,
Everything is working fine now. There was no real problem with DNS Forwarder as I found a couple of hours later that there was a massive DDOS attack using the DNS servers of my ISP TeliaSonera against Electronic Arts at the time of my installation which fooled me into believing that there was a problem with pfsense. It seems like it subsided after I switched to DNS Resolver which made me draw an incorrect conclusion. I switched back to DNS forwarder today after your mail and all is ok.
I will clear my browser cache in the future in any case of GUI abnormalities. Thank you for your other advice and I will post a Suricata feature request in the packages subsection. The line speed is still discretely faster, fluke or not :)
Thank you