SUMMARY
Essentially, when I have "Per folder view settings" enabled ("Remember display style per folder"), if I change the view settings to something other than default (ie: Details -> Icons), it will reset back to default if I leave the folder and re-enter it. This issue is prevented if I also change another setting from default (ie: sort by name -> sort by modified). I have reproduced this result multiple times. I don't know all the settings that are affected, but changing the sort mode always fixes the issue.

STEPS TO REPRODUCE
1. Set "Remember display style per folder" in preferences.
2. Change only the View Mode in a folder.
3. change directories to some other folder
4: Return to modified folder

OBSERVED RESULT
Folder reverts to default view mode.

EXPECTED RESULT
Folder view mode is the same as set previously.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1
Kernel Version: 6.12.7-arch1-1 (64-bit)

ADDITIONAL INFORMATION
I recently installed this system so I don't have data for previous versions of Dolphin.