MediaEntity Type: HasStream is not inherited

I have an entity that has no HasStream attribute and a BaseType which has HasStream set to true. Creation of the media entity fails as the type isn't recognized as a media entity.

From the spec "The value of the the HasStream attribute is inherited by all derived types."
In the method hasStream of EdmEntityTypeImpl only the current type is checked.

The hasStream Method should return true if the current type has a stream or the base type has a stream.