Enterprise Calendar - Search field under Other Calendars is returning inconsistent and incorrect results

When searching for a specific calendar after a user creates a few events under multiple calendars, the results that appear in the search field are inconsistent and sometimes incorrect.

1. Create a new user, sign out of Admin and log in as the new user
2. Create a few events under the user's calendar
3. Query for the Guest calendar by typing in "G"
4. User will see various calendar and resources results
5. Query for any calendar by typing in another letter
6. User will see various calendar and resources results as well