I'm porting KDE Connect to Plasma 5 and I just found this bug with the latest version of Dolphin and KIO from git. I don't know exactly if this bug falls under KIO or under Dolphin, sorry if I got it wrong.

KDE Connect installs a KIO slave that handles the protocol 'kdeconnect:/'. When the user accesses a phone through this KIO, the phone filesystem is mounted in a local directory in the background, and the user is presented with some fake directories in the KIO that just redirect you to the actual location the phone storages are mounted in your local FS.

The KIO slave adds the 'redirect directory' entries like this:
        KIO::UDSEntry entry;
        entry.insert(KIO::UDSEntry::UDS_NAME, "files");
        entry.insert(KIO::UDSEntry::UDS_DISPLAY_NAME, name);
        entry.insert(KIO::UDSEntry::UDS_ICON_NAME, "folder");
        entry.insert(KIO::UDSEntry::UDS_FILE_TYPE, S_IFDIR);
        entry.insert(KIO::UDSEntry::UDS_ACCESS, S_IRUSR | S_IRGRP | S_IROTH);
        entry.insert(KIO::UDSEntry::UDS_MIME_TYPE, "");
        entry.insert(KIO::UDSEntry::UDS_URL, path);
        listEntry(entry);

The bug is that, when you try to access one of this 'fake' folders that redirect you to somewhere in the local filesystem (the path indicated in KIO::UDSEntry::UDS_URL, even though I tried with UDS_TARGET_URL with the same results), the redirection actually works and you get there, but you are presented an empty directory until you press Reload (F5) or click the URL bar and press enter (effectively reloading the directory). The contents are in place all the time (you can see them using your terminal), but after the KIO redirection Dolphin just doesn't load them automatically.

This problem affects the usability of this feature of KDE Connect.

Reproducible: Always