Windows 8.1 / IE 11 Touch issue on the top navigation with dropdown

I have top navigation bar with child level dropdown as well as grand child level dropdown.

This works fine in hover events with non touch devices as well touch devices except IE 11 browser.

Issues are below,

1. But If I am working in windows 8.1/ IE 11 touch environment the dropdown disappears less then a second.
2. To fix issue #1, I had added the aria-haspopup=true.Now the issue #1 is resolved by displaying the dropdown until we have touch any where outside the navigation bar and dropdown.
3. Now the new issue arises, link in the dropdown works only when we double-tapon the link.
4. On debugging this double-tap issue I came to know aria-haspopup attribute injecting this issue.

Can anyone please help on this ?

Thanks in advance.