UM and bbpress

Hi!

Have strange problem on a site i am working on right now.
We use the function that users needs to be logged in to access forum.
If a user access directly to a topic on the bbpress forum and are not logged in they redirects to login form. Everything is fine so long.

But if the user are using wrong details first time (like wrong password) and then login correct they can not visit that topic, all other topics are working, but that one they first try to visit are sending them back to user profile only.

If user empty there browser cache and login again with right details its working with that topic also.

So some cookie problem. What can I do? Anyone else with this problem.
I recreate the problem so its not only one specific user that have this problem.