Thank you for such detailed report.
We have reproduced the issue on our side and the fix will be available as a part of the fix for the previous report (https://www.flexmonster.com/question/exitfullscreen-by-pressing-esc/) on Jan 14.
Hope it helps.
We are glad to inform you that the new version is released. It contains the fix for the issue with the fullscreen mode.
You are welcome to update the component.
The issue has been tested and seems to be resolved with version 2.6.12.