Comment in a .docx file goes 'Unresolved' after the document in reopened.

Hi. I’m facing this issue in Writer 6.4.5
I had comments in a .docx file. I hit the ‘resolve’ button under few comments. It shows resolved. But when I save that file and reopen it,all of the comments that I had ‘Resolved’ goes ‘Unresolved’ again.

tdf#134265