CS doesn’t handle nor forward bug reports, you can do so here though:
The Burning Crusade Classic
- Press Esc or click the ? button to open the menu.
- Click Support.
- Click Submit feedback or bug report.
- Enter the details of the bug into the Submit a bug description box, making sure to follow the guidelines outlined on the submission form.
- Click Submit.
Edit: Blue post below that they’re aware of it.