Dolphin file manager suddenly gets frozen when I tries to open context menu of a file. It works for Folders but not for files.
That seems like a dolphin context menu issue, i.e service menu.
Somehow one is probably trying to read the whole file.
You can try to deactivate your service menus one by one.
I just ran into this again, going through the service menus “Send file via KDE Connect” turned out to be the culprit in my case.
Edit: it turns out the kdeconnectd service was actually hanging (and the kde connect client not seeing any devices), restarting this service fixed both kde connect as well as the hanging context menu.
I’d be helpful to investigate this hang with gdb you could get a stacktrace during the hang, that would help pinpoint the issue, but that’s really technical.
We can imagine the issue to be because of the network being available or something like this.

