I keep encountering this DotVVM error when hitting ESC key after the bp:ModalDialog is already closed by custom buttons inside its markup

[liviriniu]

This does not happen when closing it just by ESC key.

It happens if hitting ESC after the ModalDialog is already closed by either this button:

or this button:

Close() is a trivial inherited method:

[liviriniu]

If I open and then close the ModalDialog by a custom close button in a repeated fashion, let's say 3 times in a row and after all this, while the modal is closed I hit Esc key repeatedly, the error is shown exactly 3 times in the dev console. So it accumulates somewhere, interesting.