Infinite "Connecting" only fixed by restart of PC

Hello,

I started playing Onyxia a few days ago. I selected Wotlk becuase well, the client is wotlk, the server expansion is vanilla. I am encountering this problem though: Ocasionally, when I start the game, it acts like it's the first time I open it. Resolution is reset to 768p (or something similar) ,the cinematic plays again, and it asks me to accept terms and conditions. i put in my credentials and it says "Connecting " but nothing is going on.

In order to fix it, I have to restart the pc, and the game suddenly remembers that it was started again, it knows my resolution, knows my username, I put in the password and it works. I noticed that this happens on a second or third or forth session, never in the first one of the day.

It's not game braking as I acn restart to fix, but it's annoying when it happens, because, well =- I have to restart, lol.

Does this sound familiar to anyone ? Any fix?