This is Ben from Typekit. I believe this is being caused by a bug in Chrome.
Here is the issue report, if you would like to subscribe to updates or leave a comment: https://code.google.com/p/chromium/issues/detail?id=236298
Because this is an issue with Chrome, there doesn't appear to be anything we can do on our side. The good news is it's been fixed. The not so good news is that the next stable release will be out in February. We're keeping an eye on this and will make sure it's resolved when Chrome is updated.
Feel free to drop us a line at: support@typekit.com with any specific questions.
Cheers, Ben