Did you see this widget: https://appstore.home.mendix.com/link/app/2583/Mendix/Scroll-To-Anchor?
Regards,
Ronald
This question seems to be asked more than a year ago. Still, my answer can be of some help to someone.
Code below worked for me.
setTimeout(function() {
$('.input').eq(0).focus();
},500);
Find first input and set focus to it. setTimeout bypassed all the other loads in my application.