Dell Networking OS for Openflow - Openflow Handshake failed

Hallo,

I am running DNOS-OF v1.1 on a Dell N1524 Switch. When I connect it to a Openflow Controller (I am using Floodlight) the Openflow handshake fails. The Problem is the FeaturesReply, that the Switch is sending to the Controller while doing the Handshake. This FeaturesReply has a length of 1824bytes, where the Controller expects 32bytes! 

When analyzing the Handshake in Wireshark I can see that there is also Openflow EXPERIMENTER Data delivered with the Featuresreply. Could anybody help me with that issue? 

Thank you in advance

marcels93