just did a fresh upgrade to Mageia 6, which is plasma5, mageia 5 was plasma4
everything looks similar

I have a bunch of files which I had renamed using this kind of formula for the batch renamer h#0, g#0, j#0...
which I expect to sort h10, h20, h30, h40, h50, h60, h70, h80, h90, h100, h110, h120......h190, h200, h210, h220
actual sort h10, h100, h110, h120...........h190, h20, h210, h220..........h290, h30, h300, h310

Dolphin preferences>General>Behavior>Sorting Mode
I was confused by "Natural Sorting" & picked Alphabetical sorting, case insensitive, neither seemed descriptive of my issue