Vaadin Grid issue when hiding columns


I have a problem with draging and droping second to the last and last header column to the leftmost side when hiding the first 2 columns. example if I have 8 columns then I hide the first 2 columns so the number of visible columns are now 6 and when I try to drag the last column to the leftmost it stops at the second to the last column same with the second to the last column. I’m using Vaadin version 7.7.12