connection to emitter, doesn't affect QML elements

[Shadow.01]

Dear users,
in my QML view I have a connection to an emitter. The syntax is something like the following. The really strange thing is that, if I put inside the onEvent section a console.log with, i.e., the emitted value, all works perfectly. If I put an any instruction that affect a QML element (also not related to the emitted value, as in the following example), nothing happens. Why? Thank you very much!

(...some QML elements...)

Connections {
            target: myengine 

            onInitProgress: {

                console.log(progress);
                labelCount.text = "test";

                
            }
        }

(...some QML elements...)

[raven-worx]

@Shadow-01
how does the emitting of the signal look like?
how do you create "myengine", anything special here?

[Shadow.01]

Thank you very much for the reply, the question was partially solved. Now I post one other but, in according to your reply, more detailed. Thanks again for the reply.