Can't trigger any event while scrolling

I noticed this case:

When I scroll my long ion-content, I’m unable to focus the input present in my footer.
I have to wait for the end of scroll in order to be able to trigger the focus event.

What I expect is that one click on the input text stops the scroll (or scroll to bottom directly) and focus is made on it, even if the content is simultaneously scrolling.

Is it normal? How to fix it?