[dolphin] [Bug 474714] New: Folder panel arrows missing and cannot be expanded on some, not all folders containing sub-folders

[Bob English]

https://bugs.kde.org/show_bug.cgi?id=474714

            Bug ID: 474714
           Summary: Folder panel arrows missing and cannot be expanded on
                    some, not all folders containing sub-folders
    Classification: Applications
           Product: dolphin
           Version: 23.08.1
          Platform: Archlinux
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: panels: folders
          Assignee: dolphin-bugs-null at kde.org
          Reporter: bobofenglish at zoho.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
***
In the folder Panel (Folders), some folders that do contain sub-ofolders do not
have a visible arrow, nor does clicking on where it should be expand the
folder, and then show the sub folders as it did until very recently  (~ A week
or two).
***
Example: my home folder (no others investigated yet), whether hidden or shown. 
48 folders in total, 23hidden (with Dot), and 25 not  hidden.  View = hidden on
or off,  mode: Icons, "Limit to home directory" = deselected; some of the ones
without arrows have only symlinks to other folders in them, some are mixed, and
some (most) do not. 

No hidden files with sub folders are missing the arrow, and the fist one
missing the arrow is # 33  but stands alone, then they are OK again, and then
from #43 on up they all have no arrows.

STEPS TO REPRODUCE
1.  open Dolphin and look.

OBSERVED RESULT
Some working folder expansion arrows are missing. 

EXPECTED RESULT

All folders with sub-folders should have visible and functioning tree expansion
arrows., 

SOFTWARE/OS VERSIONS:  Arch Linux/KDE Plasma.
KDE Plasma Version:  5.27.8
KDE Frameworks Version:  5.110.0
Qt Version:  5.15.10

ADDITIONAL INFORMATION

I am dead tired now, but will investigate commonalities/differences... anything
I can notice that may be the culprit.  Sorry, I can't help on the programming
end, as it's beyond me.

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