WotLK I've got a group bug in game that i can't fix

[Iljkresistll]

I queued for a random heroïc dungeon on Jkmiss (undead mage on Icecrown server), and when I accepted the queue, it said that teleport to instance got cancelled because it was already full, then it said that all the party members left the party. I thought it bugged out so I just tried to requeue for random heroïc dungeons, but game told me I was still in a party. I tried relogging, restarting the game, wait and restart, reloading UI, etc. Nothing worked :(

It's kind of a problem because if the bug persists I can't queue for anything anymore which is pretty annoying, and probably won't be able to join my guild raid this evening, which is planned for two weeks and for which I geared up for these past 2 weeks, would be quite unfortunate.

Any help is appreciated, thank you in advance :)

EDIT: After half an hour of tries to fix the bug, I managed to solve it by running /script LeaveParty();
Leaving that here in case it can help someone in the future.