NumberPicker scaling gives strange appearance (Nexus 5X)

Question

I have 3 NumberPicker in my layout, like that:

<NumberPicker
     android:id="@+id/panel_first_number_picker"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"/>

...

And I my fragment (onCreateView()) I set scale Y and X for these NumberPicker:

numberPicker1.setScaleX(0.9f);
numberPicker1.setScaleY(0.9f);
numberPicker2.setScaleX(0.9f);
numberPicker2.setScaleY(0.9f);
numberPicker3.setScaleX(0.9f);
numberPicker3.setScaleY(0.9f);

And Moto G4, Samsung S5, etc. there is no layout problem, but on Nexus 5X there are some vertical grey lines:

If I remove the scaling, it's OK. But I need to adjust size with setScale().
Do you have any explanation, guys?