efcore: EntityEntry.OriginalValues APIs incorrectly return current values

REcently I ported some EF code to EF Core, and noticed these behaviors. After changing a tracked entity, get its EntityEntry object, then:

1. EntityEntry.OriginalValues.Clone() In EF, it return a clone of original values. In EF Core, it returns a clone of current values. Workaround in EF Core:

var originalValues = entry.OriginalValues.Clone(); // Return current values.
originalValues.SetValues(entry.OriginalValues); // Now original values.

1. EntityEntry.OriginalValues.ToObject() In EF, it returns an entity with original values. In EF Core, it returns an entity with current values. Workaround in EF Core:

var originalValues = entry.OriginalValues.Clone();
originalValues.SetValues(entry.OriginalValues);
Product original = (Product)originalValues.ToObject();

Are these bugs, or am I using it in a wrong way?