Hi @Anonymous

Sorry for the delay, I was checking with my peers to make sure I had everything together before reaching back out with a response.  

Thank you for posting your screen shot, and to answer your question the damper handle is still there.  What you are seeing is a graphical issue, and if you switch to any other view mode other than 2D Wireframe the handle will display as one would expect.

2D Wireframe - Plan view

Damper Handle Visible - use a display setting other than 2D Wireframe

Please let me know if this helps, if not reply back to this forum and we can continue to troubleshoot!