date calender picker remain Visible in CAF of wM8.0.1

Hi All,

Am using wM8.0.1 and IE8 version, in CAF, if i click on date calender picker and move to the control in User Interface without selecting the date in the caleder, Date Calender still in visible state, it is not invisbled when i point to the other control like input text or dropdown.please find Attached word document.
is this know issue in wM8.0.1.
Anil Kumar ellendula