Cannot close the calendar frame after clicking on OK button

1. Created a new meeting.
2. When you`re in form editing, pick a date for that meeting.
3. Click OK.

Actual result:

• The calendar frame is not closed after you click OK, even multiple times.
• You need to click outside the calendar frame to close it.

Expected result:

• When I close OK button and I already have the date and hour selected, the calenar frame must disappear.