Problem with auto-closing issues when merging pull request (BB-8985)

The short story is that "close issue BCLOUD-33" works as expected but "closes issue BCLOUD-33" does not.

Whether the text is in the message of a commit that gets merged in as a pull request, or in the message of the merge commit itself, "close" ALWAYS works and "closes" NEVER works.

"See" works as expected, adding a comment to the issue with a reference to the commit.

I have not tried the other verbs.