Issue
Word output is adding additional spacing when a Rich Text Field has multiple paragraphs with spacing between them.
Resolution
To resolve this issue you will need to remove the space in the Rich Text Field. Word output will still add a space BUT it will only be the one line as desired rather than multiple.
Additional Information
Additionally, there will be a difference between the Lightning Rich Text Fields and Classic Rich Text Fields. The way Salesforce Stores the data is different and may require adjustments.