With DSM 6.2.1-23824 Update 6- 3615xs(AMD) with moments 1.3.2 installed (genuine serial number fixed transcoding and video indexing)
Two things are not working...
1. Categories except for CHILD
2. New pictures taken were not face discovered actively in people section (stuck..' says x amount of photos to be discovered' )...only fix is to reindex (guess default background indexing not working)....saw a lot of discussion with this bug elsewhere on stock boxes too and hope Synology will come up with a fix on this.
Other than the above two bugs, facial recognition/tags/places/transcoding/videos work well with newer version too (just have to be patient after the update...2days in my case)
I prefer newer versions (1.3x) compared to 1.12 because of HEIC support/shared photo library/similar photo grouping...
Hope this helps someone