On my Mac, closing the Tabnine tool (sidebar) window with a keyboard shortcut creates a 'beep' on every key press. The only way to stop it is to re-open the Tabnine tool window and close it by clicking on the tool icon.
This problem is true whether it's docked (pinned and unpinned) or floating. It doesn't happen when it's windowed (or floated).
This interrupts my workflow and focus on the task at hand.
gz#39502
(related to Zendesk ticket #39502)