Affects Version/s: 7.1.X, Master
*Steps to Reproduce: *
1. Go to Control Panel > Content > Forms > New Form
2. Add a Multiple Selection to the page
3. Make sure Required Field is selected, and add at least 2 Options
4. Publish the form
5. Preview the form and select an option
6. Deselect the option and click on the other option
Expected Behavior: The "This field is required" message does not pop up.
Actual Behavior: The "This field is required" message pops up briefly and then disappears. It can be seen longer if you hold click on the option.