Looks ok to me. If you have channels which are disconnecting after a data transmit instead of a continuous connection, this event gets generated:
Source: TCP Listener (HL7V2 → HL7V2) → Disconnected
which is flagged as an “error” by Mirth.
If there is a lot of data which gets transmitted, a lot of these events are generated.
In my environment I have disabled the event processing in the extension for servers which have such channels.