[7.0.5 Beta 2] Facebook Connect error when logging again

I log to Facebook. Then I log to Dolphin via Facebook Connect. It works OK.

Now I use Dolphin and Facebook and after a few minutes I want to log out. So now I log out of Dolphin and after that log out of Facebook.

Assume that after another few minutes I want to come back to my social sites and first I log into Facebook. Then I go to Dolphin, clik "Login", choose "Facebook Connect" and get an error message:
Cant't define your profile information

So I click again "Login", again choose "Facebook Connect" and this time I successfully log in.

Isn't it a bug?