An additional work-around is to create an authentication reference pointed to the same authentication profile as the "Any" line specifically for X-Auth. The below worked in my proof-of-concept lab where I am testing 7.1.2.
EDIT: The orginal bug is indeed fixed in 7.1.2, however the bug-fix was not applied in my POC lab since I was upgrading from earlier 7.1 code. To truly fix the "Any" OS option if you find yourself in a similar corner-case rollback to 7.0.x and then re-upgrade to 7.1.2(+) so the migration script can slipstream the bugfix in.
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