You have carefully avoided explaining why it is just mIRC that does this, and NONE of the other half dozen clients I use.
Tell me ... is this something the server does to the mIRC client and to NO OTHER? Or is it (as I said in my FIRST post) a "feature" of mIRC that could (and in my opinion SHOULD) be turned off.
Of course I do not expect any honest reply from you, you obviously haven't tried any other IRC clients to see for yourself.
As far as I'm concerned this thread is at an end due to lack of intelligent answers.