EWorld Timepicker - Time popup is rendering empty

Question

I have a EWorld timepicker server control in a Usercontrol that is in the default View of an ASP.NET MultiView control. When the page is initially loaded the time popup works fine, but when I switch the view away from and then back to the view containing the timepicker the time popup is empty.

Like so...

Here is the ASP.NET markup for the Timepicker control.

<ewc:TimePicker 
    ID="tpReportTime"
    runat="server"
    Nullable="true"
    MilitaryTime="true"
    MinuteInterval="FifteenMinutes"
    ShowClearTime="true"
    ImageUrl="~/images/clock.gif"
    ControlDisplay="TextBoxImage"
    DisableTextBoxEntry="false"
    DisplayUnselectableTimes="true"
    NumberOfColumns="4"
    PopupWidth="12.5em"
    Width="3.em"
    RoundUpMinutes="false"
    CssClass="time_picker_wrap"
    tooltip="HH:MM">
    <TextBoxLabelStyle CssClass="time_input" />
</ewc:TimePicker>

Answer 1

The problem is with this attribute's value

PopupWidth="12.5em"

Specifically the em part

When the Multiview control is changing views the Timepicker's PopupWidth attribute is reverting to it's default UnitType of Pixel. So the popup was not empty like I assumed. It was 12 pixels wide and too thin for the times to show.

If I change the value to PopupWidth="12.5px" the popup's width persists through view changes.

So why is the Timepicker doing this?