Preview of images and videos - only if files are in Photos folder

Hi there,

I am using Nextcloud for some time already - installed in the docker long time back - probably then it was version 27 or so.
Recently I upgraded to 29 and since then I cannot see anymore any photo or video, UNLESS the files are in the Photos folder.
Of course not all my photos are in this folder. And I used to see all pictures/videos on the “Photos” tab irrespective where they were on the filesystem.
Did anything change? Did I mess up anything?
Can you please assist somehow?

Thx a million and thank you all who are contributing to this magnificent project.