@meven, you’ll need to enter an invalid path > 2 times to have the path disappear:
However, I’ve been unable to reproduce the icon disappearance. Perhaps, it was due to something that Unreal Engine’s failed compilation process adds as the directory’s content (like a .desktop file with an invalid icon), since I’ve previews enabled.
Relevantly, whilst attempting to reproduce this, Dolphin informed me with a yellow banner that my current location had become unavailable, despite it not being so, because it’s stored on an internal, NVMe-connected SSD. I confirmed by immediately navigating back to it. Afterward, the “Folder”-labelled QFrame remained empty until Dolphin had been reinitialised:
@meven, per a screenshot that I’d not uploaded, I tried reproducing this at /var/spool/abrt/ccpp-2025-07-17-16:14:35.122627-75279/, where I was successful the first time (the sole time I didn’t record a screencast). It also reproduced the QFrame content render failure.
@meven, “Quit”-ing Dolphin, then reinitialising it at a different path, navigating to /var/spool/abrt/ccpp-2025-07-17-16:14:35.122627-75279/, then entering $HOME/.local/share/kio/servicemenus/, reproduced it:
This solely reproduces if the icon on the location bar isn’t present. I don’t know what determines that. I’ll presume that the cause is partially superuser directory ownership.