sortable ui version 1.12.1 crush

Hi,
jquery ui sortable plugin is crashing after update to 1.12.1.
I am using it to select from a lot of items (more than 2000). Example is below.

jQuery ui 1.11.4
http://jsfiddle.net/4rwcuk4z/

jQuery ui 1.12.1
http://jsfiddle.net/e4dhL68e/