Problem:
At first, the build was unstable (for which a mail was sent).
The next build failed.
However, the email we received stated that the build was "back to normal".

Configuration:
The build is configured to send the mail as the 2nd last step. The last step is the "Emotional Jenkins", which does not affect the outcome of the build (failed/stable).
No recent updates and I have not seen this issue before.

Attached both mails and a screenshot of the build numbers (unstable and then failed)