Drag and drop in scrollable container on element with dynamic height broken in Internet Explorer

Question

I have a scrollable container with a fixed height, in this container I have some ul lists with li items.

In my solution JavaScript is used to give all ul elements the same height, based on the element with the biggest height.
I prepared a simple fiddle, but it perfectly shows the issue.

Now it seems a drop in Internet Explorer is only possible in the area of the target list, which has been visible without scrolling.
It works without problems in Firefox and Chrome.

Steps to reproduce:

1. Open fiddle in Internet Explorer (10/11)
2. Drag an item from the left side to the right side.
3. You see a copy/move possible icon
4. Scroll the container to the bottom
5. Drag an item from the left side to the right side.
6. You see a forbbidden icon below a specific invisible point

Has anybody ever faced this issue?
Is this really a bug of Internet Explorer or did I made some mistakes?
Is this also broken in Edge?

Answer 1

Try to remove the height from the inner class. This occurs because the height of the inner container is set 100% which equals the scrollable container height.