Updating Work Item patch operation fails from Chrome browser

[jeffpriz]

I have a TFS extension that is using the sdk, I am attempting to associate a Work Item to a git Pull Request (following this: https://www.visualstudio.com/en-us/docs/integrate/api/git/pull-requests/work-items) I can send in the appropriate Patch operations and get it done, and it works when I run the extension in IE, however, when running through Chrome, it just seems to fail.
Watching the dev tools in both Chrome and IE, I can see the network calls to the api. I see two calls with the patch that return a 401.. In Chrome it ends there, in IE, a third call shows and works. Not sure why there is a difference.. Other API calls (to create or update the git Pull Request) work in both places, this patch to update the Work Item fails however.