Yes, it’s one way. The process avoids sending personally identifiable information as far as possible, so the developers that receive the information don’t know who sent it and have no way of getting back to you. (Audacity Privacy Policy: Redirecting to: https://www.audacityteam.org/desktop-privacy-notice/)
If you want someone to get back to you, use either this forum, or the new Audacity discord channel: Audacity .
(Currently, you’re more likely to receive a prompt response here.)
Do let us know what happens.
By the way, was the Flac file that you sent (in the Zip) the exact same file that you had problems with?