Tab and Shift+Tab walk straight out of the scrim into the page behind it, which is invisible to the eye but fully reachable by keyboard. Closing the backdrop drops focus at the top of the document instead of returning it to the control that opened it. The backdrop should stay a scrim rather than a dialog and still set no role or aria-modal of its own.
TabandShift+Tabwalk straight out of the scrim into the page behind it, which is invisible to the eye but fully reachable by keyboard. Closing the backdrop drops focus at the top of the document instead of returning it to the control that opened it. The backdrop should stay a scrim rather than a dialog and still set noroleoraria-modalof its own.