After you install update 4011039, you may encounter the following issues:
- If you merge vertical cells in a table, the cell content disappears, and you can’t select the merged cell.
- If you open an existing document that has a table with merged cells, the cells are displayed as blank
As a workaround, you can uninstall this update, and your tables will return to normal. MS anticipate releasing the fix for these issues in the next monthly update that’s tentatively scheduled for October 3, 2017.