404 when navigating to Commits (nav item) after merging a pull request with the delete branch option checked

• Open the Files or Commits page at a branch with an open PR.
• Merge that pull request with delete option checked
• Click the Commits nav item
  URL includes reference to deleted branch : https://stash.atlassian.com/projects/JAG/repos/jira-agile/commits?until=bugfix%2FGHS-10068
  404 page not found

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