cellnav lost focus cell and editable not working when using celltemplate

My grid is using cellnav and edit feature. The cell focus is working fine but when using custom cellTemplate for column with class: ui-grid-cell-contents

When i click to this cell, it's not focused and not show edit input. it happens sometime. so that i need to click 2-3 times or double clicks to make it editable. i am using angularjs version: v1.4.1 and ui-grid - v3.0.4 - 2015-08-13 I will update the sample in plunker.