When copy pasting from an external source to the editor, (especially when copy pasting with extra spaces), the user can face paragraph duplication issues on the post page, as well as paragraph disappearances.
In order to debug this issue and see if it is in fact caused by copy-pasting issues,
follow these instructions:
1. Search for the article in the publisher
2. Open the article in the Editor
3. Go through the paragraphs with your cursor in order to find extra spaces
4. To fix this, the writer of the article/support agent, will have to delete all extra spaces, then space the paragraph again, using shift+Enter:
Another known copy/paste issue is missing text. The reason for this issue is copy-pasting from an external source that the editor does not support (e.g Notes )