Well of course it's possible. Which IRC network are you connecting to when this happens? Does your router log any other information like the port(s) and IP addresses?
~ Edit ~
If this happens everytime you connect to a certain IRC network, then really you should talk an admin on that network and ask what's up. You can probably find out the name of an official channel by joining #Help (that itself may be an official network channel) and asking. I'm still curious about the server address and port(s) that you're using to connect so I can try and see if I get the same thing.
