Since latest update to 19.1.4 CC "merge to Panorama" in RAW does not always work!

The lastest update to Photoship CC, does not always successfully merge mutliple shots into a panorama unless I merge them within Bridge to get a PSD panorama.  If I drag the same files from bridge into Photoshop (the method whereby I get a dng file of combined images), about half the time it fails to combine and when it does work it returns different results compared to previous version.  The same images I have in the past successfully combined into a dng file no longer merge with this new firmware update. I get an error message "Unable to merge selected images".  And when the merge does happen, the result is very different from previous dng files of same selections: they are typically shorter in height.

I have noted that in this new version, it is possible to merge images with different focal length and even orientation; but far more importantly, I get too many "unable to merge" returns on landscape images I took specifically to creat Panoramas. Interestingly, if I give up in creating a dng file and simply merge within bridge to get a PSD file, those same images do combine into a panorama as before, but I lose the benefit of editting them as a dng file. Has anyone else experienced this?