Sophos Anti-Virus 9.2.2 Web Protection interfering with AJAX HTTP DELETE requests

I recently ran into an issue where I observed consecutive HTTP DELETE requests from an AngularJS application would get hung in a suspended state. The two examples I have involve a web page that contains a list of items, each of which containing a means to remove items individually. When I attempt to remove more than 2 items consecutively, the HTTP DELETE responses do not make it all the way up to the Angular application, leaving the entire application unresponsive. I've documented the issue in more detail at:

http://stackoverflow.com/questions/27701796/angularjs-subsequent-http-deletes-stay-in-pending-for-minutes/27717003#27717003

https://github.com/linnovate/mean/issues/987

When I disable Web Protection in Sophos Anti-Virus 9.2.2 for OS X 10.9.5, the misbehavior goes away, and I'm able to consecutively delete items from the Angular application.

To recreate this issue, you can download the MEAN.io stack (http://mean.io/), start node.js, and interact with the default Articles package as I've described above.