Most repository pages list the project name and repository name (with links) at the top of the page, like a typical web breadcrumb. 

However, the pull request detail pages do not. This makes it less clear which repo you are looking at.

Example:

The main Pull requests page

https://mybitbucket.mydomain.com/projects/ABC/repos/my-repos/pull-requests 

shows "abc / my-repos" at the top of the page.

But 

https://mybitbucket.mydomain.com/projects/ABC/repos/my-repos/pull-requests/25/overview 

does not.

They are also missing from the Branch Compare page and possibly others. It would be nice if the pages were consistent.