I think I found a workaround.
*This method works with: MS Word Document with Tables; Uploaded to Google Docs and still used in Google Docs as a Docx File.
**This method does not work on "Pre-Formatted" Tables - but keep your Pre-Formatted Tables.
Draw a new Temporary Table. Number of cells does not matter.
Deselect the Table and Select it again. Making sure its ONLY selected. Not in Edit Mode (ie Without the Transparent Grey Column and Row Headers)
Copy your Data from source tables.
In Affinity Publisher - with the Table Selected as in step 3 - click in the Menu Bar under:
Edit >>>
Paste Inside
Copy data from the Temporary Table and past it inside the Pre-Formatted using:
Edit >>>
Paste Without Format
Hope for the best.
Can anyone test this?
I'm kinda chuffed at my Saturday solution. **Dusts off shoulders.