I didn't find a way to report this bug, but someone may know a way or someone from community can forward the issue to technical staff.
To put simply logout on bitbucket doesn't work.
Steps to reproduce:
* Log in to Bitbucket
* Click on your profile icon in bottom left corner
* Click on Log out
Expected result:
* You should see a modal window to confirm logout and when you confirm you should be logged out
Actual result:
* Page just refreshes and you stay logged in.