Firstly, many times I use Polkit to change ACL do not apply. But... When it apply, I decided to test other think. I allow me to full access to /home. Next create directory inside /home. It was created, but message in dolphin appear that this file cannot be created. Second test was to create normal file. It passed, but file has .part suffix at the end.

STEPS TO REPRODUCE
1.  Change acl to directory using Polkit in Dolphin
2.  Create empty directory in directory you changed ACL previously
3.  Do the same, but create simple file (not directory)

OBSERVED RESULT
1. Message was appear, when creating directory telling operation cannot be done.
2. .part suffix was applied to normal file
3.  Tried many times to change ACL to directory. It was passed only once.

EXPECTED RESULT
Everything worked - I can create files/directories in places with modified ACL. I can managed ACL without worry my changes do not apply.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDENeon under libvirt (QEMU+KVM) on OpenSUSE Tumbleweed.
KDE Plasma Version: 5.24
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION