model dropdown overflow and covered.

[ArjunKarki]

Dropdown list overflow and covered by screen.I just set the dropdownStyle height to ==>height: list.length > 10 ? Metrics.height * 0.7 : list.length * 50 and like when there is around 20 item I can see only 17 and others are covered .
is there something I need to do? couse i didn't see issue related to this.