The "Contains" filter type is not very efficient, so to greatly improve performance, the default behaviors of some of the filters have been changed from "Contains" to other filter types:
1. The auto-populated list in the filter search box at the top of the grid uses the "Starts With" filter type, to assist in selecting the correct filter term.
2. The grid/list filter type defaults to "Is Equal To". If you save a view with a different type, e.g. "Contains", then that saved view will continue using the saved filter type.