If the NumericUpDown with the style "MaterialDesignOutlinedNumericUpDown" was disabled (IsEnabled=false), then a wrong style is displayed.
Versions:
- MahApps.Metro: 2.4.9
- MaterialDesignThemes: 4.3.0
- MaterialDesignThemes.MahApps: 0.2.0
Used Style: MaterialDesignOutlinedNumericUpDown
IsEnabled=true

IsEnabled=false
