[BUG] Auto playback shows random pics

Plex Media Server
1

Server Version#: 1.24.1.4931
Player Version#: Don’t know where to get it

I have added a new Photos Library with 9 sub-folders and 11 files inside the root.
When displaying my Library like this:

… if I start playing the files not in any folder (Album), the playback is totally broken because after the first/second picture in line it shows me random images from some other Album in the list.

2

I noticed this right now:

The first 5 pictures not in any album are named “image1” to “image5” and playback is fine until image 6.
The 6th image is named “Mamma” and at this point (image5), playback skips to “IMG_0003” in another Album and then continues from that point onward.