Transfering Docx to Odt: Comments on Footnote Disappeared

I’m working on my thesis. My thesis advisor sent me one of the chapters that he has checked. He sent the file in docx format, because he is using Microsoft Office. I opened the file right away with Writer, the number of page increased doubled than it should be. Then, I changed the format file to odt by using Microsoft Word. When I opened the file in Writer, it looked good, except I couldn’t fine the comments that my advisor put on some footnotes.

Does someone know how to solve this problem?