This is a bug affecting Jaws.
1. Start Google Docs and load a document.
2. Open a dialog, such as Tools > Preferences or File > Sharing.
3. Press escape.
4. Notice that focus doesn't land back in the document and actually gets completely lost requiring Alt+Tabbing to get back.

Cause:
We always fire focus events before all other events. This doesn't always work, because some focus events might be discarded if they don't arrive in the correct order related to other events.