At this point we have not planned to change the cases when the commands can be executed. What you can do is to handle the CommandExecuted event of RadRichTextBox and clear the selection from the newly inserted row/column. In this way, there will be no selection in the document after the command for adding a row/column has been executed and it will be possible to execute the command again. Here is how this can be done:
sender, CommandExecutedEventArgs e)
InsertTableRowCommand || e.Command
InsertTableRowAboveCommand || e.Command
I hope this helps.
the Telerik team