I have the same problem. I have text in the first box (on the product page in WordPress), then I have some text in the “Attributes” tab which is totally different. For some reason, after the upgrade, the description text is showing up twice and the attributes are not showing up at all. Please help fix this, it looks very unprofessional.
Could you both try adding a single line of content to both sets of data entry for the product? So have at least one line of text in both the main visual editor and the Short description and see if that helps.
You can also completely remove the tabs section for the short term with: