After trying to submit an issue through the app, I found my email failed to go through because the address set in the app doesn't exist.
Delivery to the following recipient failed permanently:
apps+feedback@wordpressfoundation.org
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain wordpressfoundation.org by wordpressfoundation.org. [66.155.40.24].
The error that the other server returned was:
550 No such person at this address"