I'm using the google drive resumable upload API and am seeing a lack of CORS headers in some cases. The pre-flight to OPTIONS always returns 200 but when making the actual requests, the headers are missing in some cases, which means I am not able to read the responses.
Not seeing CORS headers when: - uploading the final chunk - creating a resumable session - querying for session status
Seeing CORS headers when: - uploading a non-final chunk (308 status response)
