In specific cases, the box-drawing characters are not properly aligned and connected.

Observed:

1 Open RadRichTextBox and press Windows + . to to show the emoji box. 

2 Choose the emoji and press backspace to remove it.

Actual behavior: When you press the backspace to remove the emoji, a square is left

Expected behavior: When you press the backspace the emoji should be deleted.

 The AddParagraphToSelection method adds the first row of a table when it is the element after the paragraph. 

To workaround this manually select the paragraph:

var para = caret.GetCurrentParagraph();
DocumentPosition pos = new DocumentPosition(doc);
pos.MoveToDocumentElementStart(para);
selection.AddSelectionStart(pos); 
pos.MoveToDocumentElementEnd(para); 
selection.AddSelectionEnd(pos);

 this.radRichTextBox.Delete(false);

In MS Word,create a new docx file,  insert a table, select the whole table, insert a bookmark.

Open the docx file with RadRichTextBox, the bookmark is missing.

This is because the bookmarkStart is in the first tc, while the bookmarkEnd is after the last tr, TableImporter failed to import the bookmarkEnd.

Here is my fix.