Steps to Reproduce:
- Go to Site Administration > Configuration > Mobile Device Families.
- Create at least 2 Device Families.
- Create a new page in this site.
- Configure this new created page.
- Navigate to Advanced tab.
- Under Mobile Device Rule panel, uncheck "Use the same mobile device rules of the Public Pages."
- Select one Device Family. Close the pop up frame.
- Assert that the Device Family display in Mobile Device Rules panel immediately.
- Select another Device Family, closing the pop up frame.
The second Device Family should display in Mobile Device Rules panel immediately.
The second Device Family doesn't display. Reloading page can make it display.