[REG 5.13.0 -> 5.13.1] Some fonts look crumbly when Text.NativeRendering is chosen

import QtQuick 2.12
import QtQuick.Window 2.12

Window {
  visible: true
  width: 640
  height: 480
  title: qsTr("Native Text Rendering")

  Column {
    anchors.centerIn: parent
    spacing: 10

    Repeater {
      model: 10

      Row {
        anchors.horizontalCenter: parent.horizontalCenter
        spacing: 10

        Text {
          text: "Font Size " + font.pixelSize
          font.family: "Open Sans"
          font.pixelSize: 8 + index
          renderType: Text.NativeRendering
        }
        Text {
          text: "Bold"
          font.family: "Open Sans"
          font.pixelSize: 8 + index
          font.bold: true
          renderType: Text.NativeRendering
        }
        Text {
          text: "Italic"
          font.family: "Open Sans"
          font.pixelSize: 8 + index
          font.italic: true
          renderType: Text.NativeRendering
        }
        Text {
          text: "BoldItalic"
          font.family: "Open Sans"
          font.pixelSize: 8 + index
          font.bold: true
          font.italic: true
          renderType: Text.NativeRendering
        }
      }
    }
  }
}