When using the WP UI's UI drop-down button in the TinyMCE editor, I select one of the drop-down selections and the appropriate dialog pops up for entering information (e.g. a new tab). When I click Insert within the dialog, the dialog closes and the ENTIRE content of the editor is REPLACED by the generated shortcode.
This only happens when the editor is in Visual mode. It works fine when it is in HTML mode.
Please help. I do the majority of my editing in Visual mode.