Subpages being reordered randomly after saving

I’ve never run into this issue using Kirby before, but for some reason I’m unable to sort the subpages without having them being reordered automatically. Usually dragging works just fine.

The only thing that works is manually changing the prepended numbers in the folder names – however, if I make any change in the panel at all (i.e. changing the title) and save, the whole list gets reordered again.

Curious if this sounds like a bug or something in my code. I haven’t added any special sorting options in the blueprint, and in my template I just have children() -> visible() without sorting as well.

Thanks in advance!

This is a known bug, introduced in Kirby 2.5.9.