Saving image in CameraRAW strips GPano metadata, but Opening and Saving doesn't

I am working with some 360º panoramic images.  They all have the <GPano> metadata tags in them so that Camera RAW will recognize that they are 360 images and perform Edge Aware filters on them.  This all works fine.  However, if I Save the file(s) as JPEG directly from the CameraRAW dialog in Photoshop by clicking the Save Image button in the upper-right corner, the resulting saved file will be stripped of the <GPano> metadata and therefore will not be recognized as a 360 panorama anywhere else that I use it (Facebook, Google Photos, etc.).

But... if instead of saving the image directly in the Camera RAW dialog I Open it into Photoshop then there I can save the file as a JPEG (after converting it from 16-bit to 8-bit) and the <GPano> metadata is preserved correctly.

So, the bug is that Camera RAW is not including the <GPano> metadata from the original .dng files when it saves JPEGs.  But opening it into Photoshop and saving from there *does* include the metadata.