problem viewing edited docx

Hi,

i reported this as a comment on a previous issue, but its was already flagged as 'answered' and you might have not seen it, so i report it again.

I'm using google viewer as a substitute for the soon-to-be-shut-down zoho viewer. I can view docx with no problem, until i edit them with zoho writer, which makes the document unreadable for viewer, and it happens just with docx. Any other format works just fine (doc, xls, xlsx, ppt...), either in google viewer and in the pertinent zoho editor, which makes me think it ha nothing to do with the way we save the document.

Is there any specific action that should be made to treat docx files so google viwer can show them once saved in zoho docs ?

Thank you very much in advance.

Kind regards,

Dani