I've actually had that same problem before except it was with a different chat room. I know you probably aren't going to be happy with my solution but I did everything I could to fix it and it would never go away. It eventually disappeared on its own (I want to say that it was after the next patch but I could be wrong).
I'd say deal with it until after the next patch, at which point if it isn't gone then contacting Riot about it might be better. At least they'll let you know that it will be fixed 'Soon™'.
I'd say deal with it until after the next patch, at which point if it isn't gone then contacting Riot about it might be better. At least they'll let you know that it will be fixed 'Soon™'.
Many an opportunity is lost because a man is out looking for four-leaf clovers. ~Author Unknown
When I was young, I observed that nine out of ten things I did were failures. So I did ten times more work. ~George Bernard Shaw
When I was young, I observed that nine out of ten things I did were failures. So I did ten times more work. ~George Bernard Shaw
Lol, I only have like ~300 wins. I just went on a decent win streak and was saving up for a couple champions. Bought Zilean and Morgana today.

Thanks to Fatelblade for the sig!
I have never seen this problem before...
Sorry dude, maybe try contacting League support?
Sorry dude, maybe try contacting League support?

Thanks to me and Elleeeeeka (love that name) for my sigs.
If i made a helpful comment on your guide/build, then hit that +rep button. or don't, its not like i care.
ALL HAIL QUEEN CHRYSALIS!
I'm sure that chat doesn't go away, and gets filled once you get buddies in your party.
That is for when your about to search for a game.
That is for when your about to search for a game.
OWNED Champions (25) :
MAINs - Sion, Zilean
ALTs - Annie, Soraka, Ryze,
Ashe, Tristana, Karthus
OTHER - Jax, Singed, Gangplank,
Kassadin, Twisted Fate, Taric, Twitch,
Katarina, Anivia, Shaco, Blitzcrank,
Dr.Mundo, Alistar, Heimerdinger,
Corki, Master Yi, Nunu
MAINs - Sion, Zilean
ALTs - Annie, Soraka, Ryze,
Ashe, Tristana, Karthus
OTHER - Jax, Singed, Gangplank,
Kassadin, Twisted Fate, Taric, Twitch,
Katarina, Anivia, Shaco, Blitzcrank,
Dr.Mundo, Alistar, Heimerdinger,
Corki, Master Yi, Nunu
Other people don't seem to have this issue. I close it down every time I login, and a new window opens when I'm queued for a match like it should. I'm pretty sure if I don't close it, I'll have 2 Arranged Team Chats while queueing for a game. I'll have to test this today at some point.
It only seems to be my account that causes the problem. Any other account in my house or on this computer functions normally, even my smurfs.
It only seems to be my account that causes the problem. Any other account in my house or on this computer functions normally, even my smurfs.

Thanks to The_Nameless_Bard for the sig!
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This has been happening for a while. Every time I log into LoL, this empty chat room pops up. I can just close it, but it's annoying to have to do so every single time. I would appreciate it if someone could tell me how to get it to stop appearing when I login. No one else I know has had this problem.
Thanks in advance.
P.S. The "Autojoin on Startup" box is un-checked. I've tried it both ways and it doesn't stop it.