Not working when back and navigate again to current screen

[helloimfrog]

For example: It works normally in screen 2, but when back to previous screen and navigate again to screen 2, it can't detect if keyboard show or hide anymore. :<

[helloimfrog]

I've found the solution for this problem: removeListener on dispose()
For Example:
var keyboardVisibilityNoti = KeyboardVisibilityNotification();
var keyboardVisibilityNotiId = keyboardVisibilityNoti.addNewListener(onShow: () {
_hideEmojiChooser();
isKeyboardShowing = true;
}, onHide: () {
isKeyboardShowing = false;
});

and in disspose:
@OverRide
void dispose() {
keyboardVisibilityNoti.removeListener(keyboardVisibilityNotiId);
super.dispose();
}