VNStatefulRequest in Core Image

The new VNGeneratePersonSegmentationRequest is a stateful request, i.e. it keeps state and improves the segmentation mask generation for subsequent frames.

There is also the new CIPersonSegmentationFilter as a convenient way for using the API with Core Image. But since the Vision request is stateful, I was wondering how this is handled by the Core Image filter.

Does the filter also keep state between subsequent calls? How is the "The request requires the use of CMSampleBuffers with timestamps as input" requirement of VNStatefulRequest ensured?