After refreshing page in a tab other than View and later return to View tab, form preview is not displayed.
1. Go to Content/Content structure.
2. Click Create button and select Form.
3. Create form and publish.
4. Go to tab other than View (e.g. Submissions)
5. Refresh page.
6. Go back to View tab.
Form preview is not displayed, see attached screen. After refreshing page in View tab preview is visible.
Form preview is always displayed.