I am facing a couple of issues with jQuery drag and drop.Below is the link to my code

https://plnkr.co/edit/uKs7FHvVQqSizcig7sP8?p=preview

Issue 1: On chrome, after drag, the dragged element is NOT draggable anymore, but rest all elements are. For instance, say, if I drag "Test1" over "Test 3", then after the drop, Test 1 is not draggable but other elements are. It happens every time with the dragged element

Issue 2:  Though it works on Edge, it doesn't work on IE at all. Once dragged element is dropped, html doesn't repaint.

Any suggestions how to resolve these?