Very slow loading times for WebDAV server

Help
1

Hello!
Since a couple of weeks now I am experiencing an issue with a WebDAV server I have added as a network folder in Dolphin. Whenever I open that folder, I often get very slow loading times (2min - 5min for each navigation I do). There are sometimes instances it works fine tho but I currently cannot see a pattern why it happens (about ~90% of the times I get these loading times). The weird thing is that I have another WebDAV share, which is a Nextcloud instance, that loads just fine even when the other one is having these slow loading times.
The issue seems to not come from the WebDAV server itself, because I am now using Thunar with the gvfs-dnssd package to use that WebDAV server and it works just fine. The same is when I try opening that server on my mobile device with an app where I am not seeing those issues.

Are there any methods I can use to debug the issue / what tools are available for something like this? Or any log files, couldn’t find anything in the journalctl logs.

I am experiencing the same issue on Arch Linux on my computer and on Fedora 44 on my Laptop.

KDE Plasma Version: 6.6.4
Dolphin Version: 26.04.1
Kio Fuse Version: 5.1.1

2

Are the previews turned on for remote servers ?

How many files are there in the folders concerned ?

Is there any output when launching dolphin on the terminal ?

3

I have previews disabled for remote servers.
Dolphin do not get any output when launching dolphin on the terminal and going through the folder.
In total there are 23 sub-folders with 150 files.
I have added some debugging stuff to my WebDAV server. I clicked on the WebDAV folder at exactly 15:13:00. Exactly one minute later at 15:14:00, the first request for the root directory was received by the server and replied within a couple of ms (still loading on dolphin). One minute later at 15:15:00 some new requests came in the information of the 16 folders that exist in the root directory (before it just requested the root folder) after which it showed all folders on dolphin.
I do suspect that it could have something to do with my WiFi connection because I just tried switching to my mobile hotspot which worked fine again. It is very weird tho because everything else on the network is working just fine. Will try some more networking stuff later.