Unable to correctly update HG pull request. (BB-14061)

After a pull request is created, the pull request cannot be moved to a different HEAD.

I am in a situation were I required a rebase/merge operation to fix a merge conflict and the pull request did not update to reflect. If I click "Edit" in the pull request, the commits listed at the bottom are correct. After I select "Update Pull Request", BitBucket returns to the pull request page, but the commits as seen in the commits tab are still the previous SHA1 identifiers (or whatever type mercurial uses).

Also, I cannot seem to change the branch of the "Pull" location when editting the pull request. No branches or tags other than Default are available.