Cirrus Link Distributor: Error Parsing Connect Message

Anyone seen this error before?

com.cirruslink.chariot.common.control.ControlPacketException: 
    Error parsing message of type CONNECT, 
    expected fixed header flags value (0) instead of (6)

I'm trying to connect to an Ixon router. I do not have access to the configuration on the router, the OEM is changing the settings. They showed me the configuration they used, and everything looks correct and set to Sparkplug B, port 1883, etc.
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Wireshark shows missing connect packet.
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