paper-item container is misplaced at first when changing page resolution.

[Krishuthapa]

I have used paper-dropdown-menu inside paper dialog and at first when i open the page displaying it in full screen the position of paper-item container is where its supposed to be . And when i make the screen size small even that time the positioning is same.But now after that if a make the screen full size again the paper-item container containing the dropdown select contents gets misplaced.How do i solve this issue?