That was changed in 6.30. I agree that it doesn't really make sense, but there was a reason behind it (basically just letting you know something was typed in that window since the last time you had mIRC active). If enough people requested it to be changed back, maybe it would be. Then again, maybe it wouldn't. All you can really do is ask for it in the Feature Requests forum (preferably as a reply to a thread already posted about it).
