Why do I have to click on Run 'app' twice to apply the latest changes

Question

I saw that there is a question which is the same of my issue, this is the link, but I want to add more details.

In the first run I wrote in the xml row

<androidx.appcompat.widget.AppCompatTextView
    ......
    android:text='@{model.type + model.points + " test 1 " + @string/points}'
    ...... />

While the run gives me:

And in the second run you can see that " test 1 " is working in the image bellow:

Thanks for helping