TCP:Except state=1(pnn)

[otter117]

Installed new OBi110 and updated firmware to:
SoftwareVersion   1.2.1 (Build: 2384)
OBi110 is a DHCP client and has IP address 192.168.23.138
enabled logging level 7.
Now I see many messages logged from the OBi110:

Jul  5 09:57:20 192.168.23.138 TCP:Except state=1(pnn) 32
Jul  5 09:58:40 192.168.23.138 TCP:Except state=1(pnn) 34
Jul  5 10:00:05 192.168.23.138 TCP:Except state=1(pnn) 36
Jul  5 10:01:25 192.168.23.138 TCP:Except state=1(pnn) 38
Jul  5 10:02:52 192.168.23.138 TCP:Except state=1(pnn) 40
Jul  5 10:04:13 192.168.23.138 TCP:Except state=1(pnn) 42
Jul  5 10:05:33 192.168.23.138 TCP:Except state=1(pnn) 44
Jul  5 10:06:54 192.168.23.138 TCP:Except state=1(pnn) 46
Jul  5 10:08:14 192.168.23.138 TCP:Except state=1(pnn) 48

turning log level to 6 suppresses these messages but also others I do want to see.
Is there a problem with my network?