I'm having some issues with the face-recognition in the Samsung Gallery app (11.1.02.1 on S10), let me start of by saying I'm very happy the device does local image-recognition and it works reasonably well. I'm very happy I don't need to upload my photos to some cloud provider to get these kind of features.
I'm missing a few features though;
it seems pretty much impossible to reset whatever has been recognized (except by deleting the file probably), resetting cache & data for the Gallery app, or the CMHProvider (this seems to be the actual face recognition service) doesn't help.
why is there no explicit "scan now" button with progress indicator provided? There seems only to be some invisible background job
I'm also seeing these bugs:
The number of people tagged in the photo is inconsistent with the list of "People" shown below
I have photos where the same person is tagged multiple times, sometimes with actual tags, sometimes with extra "?" question-marks
Sometimes completely unrelated photos are grouped, eg a photo a bearded men is grouped with a child and photo of a random woman
A picture says more than a thousand words, so I've attached an example. As you can guess, I did not tag myself and I'm also not in this photo