Stuck in a non-existing Dungeon Party! [Icecrown]

After I finished a dungeon and the group started leaving one by one, I teleported outside noticing that the party was no more as usual.

Later on I noticed that I could not join any dungeon anymore, because " one of my party members failed to select ready ", I cannot leave this seemingly invisible party.

I have tried to check if I could just " Leave Party " but the option is not available, nor can I /script LeaveParty(), trying only caused a message to say "You are not the party leader" it is also not fixed by restarting nor reloading.

I can not queue for a dungeon, nor can I join a battleground, as I "cannot queue for a battleground or arena while using the dungeon system".

Is there anything that could be done ?