[REG: 5.15.1->5.15.2] Url request interceptor is now reporting GET request for OPTIONS request made by xhr.withCredentials

To reproduce run attached example and press "Run test". It prints out the requests made through interceptor and it shows it is now saying GET request with newer versions, even though it is actually making OPTIONS request to the server.

Since this was correctly reported in earlier versions, it sounds like a bug.