Hold on, I didn't properly test this. It closes because of the controller window gaining focus, my idea was to also have it close when the pin is checked which this patch doesn't fix.

i don't think the panel controller does that, but would be easy to do so? (in the panel containment, when isuserconfiguring proeprty changes)

Of course I meant the code in panel containment, but here it does expanded = false and that's what I wanted to listen to :)

Plasmoid.onUserConfiguringChanged: {
    ...
        if (plasmoid.userConfiguring) {
            for (var i = 0; i < plasmoid.applets.length; ++i) {
                plasmoid.applets[i].expanded = false;
            }
        ...
}

But perhaps AppletInterface sees that we force expanded rep and then ignores that request.

In D4842#90987, @broulik wrote:

Of course I meant the code in panel containment, but here it does expanded = false and that's what I wanted to listen to :)

Plasmoid.onUserConfiguringChanged: {
    ...
        if (plasmoid.userConfiguring) {
            for (var i = 0; i < plasmoid.applets.length; ++i) {
                plasmoid.applets[i].expanded = false;
            }
        ...
}

But perhaps AppletInterface sees that we force expanded rep and then ignores that request.

to me a pinned calendar gets correctly closed, not the systray