Yes, there are many presets in the app whose wallpapers I don’t care for either. One issue with the app failing to randomly change wallpapers could be the OS throttling the app in the background. If the app is killed for Battery saving reasons, I doubt it can do it’s job.

I also currently have one generated by Tapet as my wallpaper. On a tangent, the app seems to have undergone a rehaul in terms of UI, atleast on Android.

Did you intend to say GNU/Linux?

Is that Tidal ?