The issue can be reproducible by accessing the below mentioned URL links:
http://74.209.247.77/testing.html
OR
There are two question items, the first question item is a multiple choice question item which is displayed initially when the page is loaded, and when we click on the "Next" button in the page then the Bar Graph question item is displayed where we can reproduce the issue, the slider handle will not move when clicked on it and dragged.