A reported combination — a <form> inside a contained, non-modal
overlay, with two text-input custom elements and a submit-typed button
custom element — was said to ignore keydown's preventDefault() on
Enter and submit anyway, but only with a real (trusted) key event, not
a synthetic dispatchEvent one.

Reconstructing the exact combination with a real trusted key press
(via the browser test runner's CDP-backed input, not dispatchEvent)
does not reproduce it here, narrowed across three steps (a native
input control, this package's input alone, then the full combination).
Kept as a permanent regression guard either way.