Odd Dolphin behavior - hiding folders? Maybe a filter by design?

[oshunluvr]

Dolphin 22.04.2 on KDEneon - but posted here as it seems relevant to Kubuntu...

I was fiddling with "guestmount" today to mount a VMDK file from an old VirtualBox VM to grab a single file. I created a folder /mnt/guest the usual way and mounted the drive image to it, no problem. But when I browsed the /mnt/folder with Dolphin, /mnt/guest was not listed.

I hit F4 to open the terminal and "ls" showed the folder. Then I realized a another folder (FAA) was not showing either. Very odd.

Here's the terminal output:

stuart@office:/mnt$ ll
total 44
drwxr-xr-x 1 root root 140 Jun 24 12:43 ./
drwxr-xr-x 1 root root 272 Nov 3 2021 ../
drwxr-xr-x 2 root root 0 Jun 21 14:12 faa/
drwxr-xr-x 1 root root 0 Aug 20 2018 grub/
drwxr-xr-x 1 root root 0 Jun 24 12:43 guest/
drwxr-xr-x 1 root root 48 May 28 2018 private/
drwxr-xr-x 1 root root 242 Jun 19 06:42 root_backup/
drwxr-xr-x 2 root root 0 Jun 21 14:12 router/
drwxr-xr-x 1 stuart stuart 82 Dec 16 2020 storage/
drwxr-xr-x 4 root root 4096 Jul 27 2020 vm_backup/
drwxr-xr-x 4 root root 4096 Jun 21 15:12 vm_drive1/
drwxr-xr-x 4 root root 4096 Jun 22 09:21 vm_drive2/
stuart@office:/mnt$

but here's what Dolphin showed after un-mounting the drive image. Before un-mounting it the folder wasn't visible in Dolphin:



With the drive image mounted (and not showing in Dolphin), it lists like this in the terminal:
d????????? ? ? ? ? ? guest/


So when the image is not mounted, the folder is shown in Dolphin, but when mounted it is not.

The FAA folder is an ftp/samba mountpoint to a USB drive on my router. When it's not mounted, Dolphin doesn't show it. Once I "open" the mount using the "Network > SMB" then Dolphin displays it.

It seems likely that the behavior may be intended regarding the SMB folder, but odd nonetheless. Why hide a folder based on it's mount status?

As far as the image mount - probably a file system handling issue and Dolphin just has no way to display it when mounted this way.