The latest 2016 version treelist some time doesn't return the right data when apply the filter on column.
Here's the code which you can repeat that bug. When I apply a filter on column ClassSecurity start with "U", the data is incorrect. But the old 2015 version is good.
2016 version http://dojo.telerik.com/@cchu/IwUso
2015 version http://dojo.telerik.com/@cchu/uZADe