I get the same behavior IF there's a paragraph in the content control in addition to the table. Can you show me your document?
If you insert the table by hand in the UI there is definitely a paragraph in the content control.


(Turn on show markup or examine the document.xml file in the package, you'll see it.) You can either delete it manually with the XML editor in Visual Studio or select it and then select beyond the bottom of the control to delete it to mimic my scenario.


Once the paragraph is gone, I can not find a way (via automation) to re-add it either. If you're having trouble creating such a content control, I can attach a sample document.