Digest request failed

[purecod3]

I am getting an error of Digest request failed printed and an exception at line 150 of session.py (kwargs["headers"]["Authorization"] = "Bearer " + self._redigest()) after a few thousand (~7,000 to 14,000) create and post requests. The number of requests before the error occurs vary. I believe the digest request is returning None. Code has been running OK for a few months until yesterday. I am wondering if anyone else is running into the same issue or has found a workaround.