We have a strange production issue with a SharePoint 2013 master page. It has a script tag pointing to an external script:
Which is somehow getting changed to:
...which is bad. There is nothing in the version history, so it must be getting SystemUpdate'd somehow, and it's happening simultaneously across all site collections, so I assume it is some kind of timer job doing this.
This happens every couple of days or so. We fix and publish the files, and a few days later they revert back again with no record in version history.
We've found another report of this issue (on 2010) which suggests a patch might be responsible. Our farm's version number is 15.0.4649.1000 (September 2014 CU). It was a fresh install, not upgraded from 2010.
EDIT: We have a couple different authentication mechanisms that require referencing the script in the protocol-agnostic manner.
Anyone ever see this before, and know of a fix?