Odd behavior when in draggable element

[icithis]

This appears to generate some very large invisible elements via absolute positioning. Unfortunately, this gives no easy way to use HTML5's draggable option. Is this intended?

Example: https://jsfiddle.net/FoomFries/typnxbv6/4/

[FranckFreiburger]

It seems that z-index: -1; visibility: hidden is not sufficient (I don't know why)
I will try to add pointer-events: none;