@junodite
Each SQ can only have one active network MIDI connection (as used by the Companion module) at any time.
So the first thing I’d recommend checking is that you don’t have A&H MIDI Control running anywhere, or any other instances of Companion that may be trying to use the same connection.
Following that, check that nothing else on the network is sending the SQ network messages and that there are no possible network feedback loops.
If neither of these things point to the problem, please contact us directly through support.allen-heath.com with more details on the system setup and any other applications you have running so we can investigate further.
Thanks!
Keith.