If using both tabs, clicking "edit" updates the url to action=edit rather than veaction=edit, meaning that then reloading the page will effectively switch from VE to wikitext.
Steps to reproduce:
- Visit article.
- Click "edit", launching VE.
- Reload page.
Expected result: page reloads, remaining in VE.
Actual result: page reloads, switching to wikitext editor.