In this wiki edit just now, saved with the visual mode of VisualEditor, one can see that the edit was saved to the database with a lot of unrelated changes.

Including:

• Whitespace removal in headings syntax.
• Whitespace removal in table syntax.
• Whitespace removal in bullet point.

This used to work and is likely a regression in Parsoid, not VisualEditor, but I am unable to confirm that at this time.