Hi Arul,
Syncfusion Greetings!
We suspect that the reported problems are might be due to the contents in the input word document which you tried to copy and paste to Documenteditor. So, could you please provide us the input Word document which used at your end. Thereby, we will analyze further and provide you the appropriate solution at the earliest.
Note: If you have any confidential data in your Word document, please replace with some dummy data and provide us the same. We just need your document to recreate the problem you face.
Regards,
Suriya M.