Getting an error when entering my correct password when prompted to do so when pushing

I have two different BitBucket Servers to which I am connecting. The first one is BitBucket Server version 4.7.1 which I connect to via HTTPS protocol (actually the url is just http://foo.bar:7990). The second one is BitBucket Server version 5.7.1 which I connect to via HTTPS protocol (and the url for this one is actually https://baz.bar:8443). 

I have tried using the Beta version 2.7.1 (155) and the issue still persisted. I have deleted all passwords from KeyChain Access with no success. I also tried completely uninstalling the application and deleting both _{/Library/Application Support/SourceTree and} /Library/Preferences/com.torusknot.SourceTree* and then reinstalling again with no success. 

I also tried reverting to 2.6.3 (134) and that seems to partially solved the issue. I now no longer get the error when working with server version 4.7.1 and I can see the password for that in KeyChain Access. However with server version 5.7.1 I don't see the password in KeyChain Access and every time I interact with that server I have to enter the password twice before this succeeds. 

What is the best way to report this issue to Atlassian? I am not sure if it is helpful or not to post the a question that has been marked as solved which it seems like many users are still having issues with.

Note that "foo" and "baz" aren't the same servers but my username and credentials are the same on "foo" and "baz".

This is from a discussion at: https://community.atlassian.com/t5/Sourcetree-questions/Why-do-I-get-this-error-when-entering-my-correct-password-when/qaq-p/706468