Comments are not being saved to the cloud; downloaded files are missing comments

I am making comments to a large document, but they are not saving to the cloud. To work around this, I am downloading the file every time I make comments, with the hopes up uploading that file to Adobe again and continue to the comments. However, now when I download the file, the page is missing the last 6 pages of comments, even though they appear in the document on the cloud. What am I suppose to do? This software flaw is posing a major challenge to my work, and I'm sure it's not new. Never happens with Google Docs.