Note that mIRC uses '1' for the window's state (non maximized) instead of 2 (maximized) even if you maximized the channel window before /exiting mIRC.
That is right, this is what it should be doing here. It will not save the maximized state unless you use the save position option.
Note also that mIRC use -1 for x and y even if the window is not maximized before /exiting, I'm not sure that's correct.
That is also right. mIRC has used -1 -1 as a non-saved position in [windows] for about thirty years.
I just followed your steps 1 - 6 and 7 - 10 and was unable to reproduce the issue. After step 10, if I /exit -nr and then issue the exact same /server command, mIRC rejoins the channel maximized.
You did not mention that you maximized/restored any windows manually at any point. Based on your original report, this issue is related to saving the windows maximized position? I manually maximized the channel before step 8, so it would save maximized. I then restored all windows before step 9 so that when mIRC restarted, the status window would be non-maximized.
