AppActions is not signal emitted

[junhyeongkim]

Hello

I originally used Qt5.9.6 LTS and updated the version to QT5.12.6LTS this year.
But it's embarrassing that QuickFlux doesn't seem to emit a signal. I've been using it well in version 5.9.
I don't know why. I can't show the detail code, but I will show you how the flow works

Appaction.qml

import qtquick 2.0
import quickflux 1.0

ActionCreator {
.....
......
....
signal a()

}

test1.qml
...
....
.....
function test()
{
Appaction.a();
}

networkmiddleware.qml

import qtquick 2.0
import quickflux 1.1
import QtQuick.Dialogs 1.2

Middleware {
....
.......
.....
function a() {
console.log("HERE") //No log is taken.
}
}

I want to be logged. However, the log which was removed in the previous 5.9.6 version is not recorded after updating to 5.12.6. That is, no signal is emitted.
I searched like this, because there is nothing to search.
I'm Korean and I use Google Translate. I would be very grateful if you understood the wrong English.