Preconditions:

Created Content Type with ezdatetime field

Steps:

1. Go to Content/Content structure
2. Click Create and select Content Type from preconditions
3. Select date and time in ezdatetime field
4. Click button to clear the ezdatetime field
5. Click again inside ezdatetime field

Actual result:

Date and time are selected on calendar

Expected result:

ezdatetime calendar shouldn't have anything selected