Yeah, the regression happened in Frameworks 6.19, so versions up to 6.18 are working as intended.
The bug is marked as very high priority, so 6.19 will soon get something like 6.19.1 which fixes the regression. Not true, see:
You can build your own KIO package with the patch applied if you need the bug fixed sooner. It’s not that hard, call me up if you need help.