Summary

C Driver 1.19.0 reports HMAC key issue

Environment

C 1.19.0 + MongoDB shared cluster 4.0.24.

Centos 7, MongoDB 4.0.24 (it also happens with the eoled 3.6)

Sharded cluster with multiple mongoS.

How to Reproduce

_I didn't find a concise way of reproducing it, but more info can be found here:
https://jira.mongodb.org/browse/GODRIVER-2127
https://jira.mongodb.org/browse/DRIVERS-1904
https://jira.mongodb.org/browse/PYTHON-1434_

Additional Background

This issue seems to be present in all drivers and all of them react differently to it where Python seems the one that is more tolerant. Matt mentioned in DRIVERS-1904 that this can affect up to 100% of the operations and I would consider it a high priority.