Default search column is different for different users after the London Upgrade. Some users have default search column set to "Urgency" or "Number" instead of "for text"
User preference: <table>.db.order indicates which column is used to sort records in a list.
This record updates automatically each time the user changes the sort order for the table.
If you would like to set a default search behavior for all users, you can utilize this system property: incident.db.order
> Find the system user preference where User IS EMPTY and System checkbox is checked,
> Give it a value: for_text, the search will be based on "For text".
NOTE: However, if a user sorted the list, his/her user preference will override this property.