Hi Alex, I need more information than the brief sentence you gave describing the issue as I am not as familiar with Mustella as you are.
Please raise a JIRA issue with the exact steps to reproduce and error message and I'll try and fix. I really don't think there is any need to revert code that was checked in before Mustella was donated especially when it's an issue with a test. Doing so it may break the SDK for anyone that happen to be using that feature. Thanks, Justin