1. Go to platform ui admin interface;

2. Create a folder or something with a rich text field definition, and on its richtext field, paste a table whether from the web or form Office word or excel (follow-up on EZP-26884).

3. If the table has been pasted correctly (as an actual table, you should have resize handles on it), try to preview the content.
Verify that the resize handles of the table show, misaligned from the actual table, and can actually change the table on the preview and even delete elements from it (which you can verify by afterwards closing Preview and being back to edit view).