Merged pull requests are not being closed

We have the following pull requests that have all been merged into the target branch, but Bitbucket has not closed them:

• https://bitbucket.org/metabrainz/musicbrainz-server/pull-request/146/mbs-6213-permit-isrcs-starting-with-tc
• https://bitbucket.org/metabrainz/musicbrainz-server/pull-request/186/mbs-6271-construct-correct-cdtoc
• https://bitbucket.org/metabrainz/musicbrainz-server/pull-request/189/mbs-6295-track-identifier-related-changes
• https://bitbucket.org/metabrainz/musicbrainz-server/pull-request/187/mbs-6293-update-ws-1-track-lookup-by-puid
• https://bitbucket.org/metabrainz/musicbrainz-server/pull-request/181/fix-ws-2-json-tests
• https://bitbucket.org/metabrainz/musicbrainz-server/pull-request/184/check-release-events-without-a-country
• https://bitbucket.org/metabrainz/musicbrainz-server/pull-request/160/mbs-5772-add-support-for-adding-examples
• https://bitbucket.org/metabrainz/musicbrainz-server/pull-request/183/do-not-update-last_login_date-when-server