v4: Cannot use input of a popover inside modal

Created by: nunofilipesf

I've tried to create a modal with a popover inside. This popover has html content with an input and a select.

If i open the modal and the popover, i can use the select, but not the input. Also, the focus is not on the input.

Sample here: https://jsfiddle.net/bpx3zsyz/2/

Tested in Chrome, Edge and Firefox, always with the same behaviour