I am trying to figure out why the helper icon for controls do not render properly inside a table.  

I have a radio button with "Helper text" set to "Help icon with overlay on hover".  When this control is outside of a table, the help icon and hover functionality works normally.  But when the control is inside of a table cell (data source for the table is a Page List), no icon appears.  This is a non-optimized table.

Is this a known limitation/defect?  

Screenshot below shows two radio buttons, both configured the same - one in a table cell the other outside.  This behaviour is the same for any type of control that has the "helper text" option.  Inspecting the generated HTML shows that the <i> for the helper icon is not present for controls inside a table.