1. Extract the attached word file.

2. Open it and copy the table content.

3. Go to https://demos.telerik.com/aspnet-ajax/editor/examples/cleaningwordformatting/defaultcs.aspx and paste it without stripping the Word formatting - everything will be fine.

4. Paste it again with stripping the Word formatting - you will see the problem - there is a ticker border around many of the cells:

If you paste the content without stripping the formatting and after that strip it with the FormatStripper the ticker border will not appear.