BF3 Co-op games won't start (stuck on "Initializing")

That's clearly an issue with BF3.

I was playing coop without any issue for 2 days.

Then for no explainable reason one hour later it didn't worked anymore.

I didn't changed anything on my computer or network settings.

There are many users with this issue, just google, you just can't ignore that it's a real issue.