I've seemed to find a regression in SMPlayer's Playlist in versions 16.8 and 16.9.
Steps to reproduce:
1. Consider having the following files in a folder:
Movie.S01E01.mkv
Movie.S01E02.mkv
Movie.S01E03.mkv
Movie.S01E04.mkv
Movie.S01E05.mkv
Movie.S01E06.mkv
2. I'm starting SMPlayer by double-clicking "Movie.S01E01.mkv".
3. Then I manually add the rest of the files to the Playlist, in the same order as mentioned above.
4. Then I proceed to the next file, Movie.S01E02.mkv, and pause it during the playback.
5. Then I restart SMPlayer (exit it and start again).
The expected behavior: SMPlayer's Playlist should be at Movie.S01E02.mkv, where it was paused.
The actual behavior: SMPlayer's Playlist is at Movie.S01E05.mkv. (???)