Switching to Source multiple times after selecting a cell value expands the selection to other cells

Steps to reproduce

1. Edit (in-place or WYSIWYG mode) a page containing a populated table (e.g. Sandbox)
2. Select an entire value from a cell (all cell content)
3. Click on 'Source' to enter source edit mode
4. Observe the selection
5. Click on 'Source' again
6. Observe the selection in WYSIWYG mode

Expected results

The selection remains only on the first selected cell.

Actual results

The selection is advanced to another cell.

Please see the attached video.