InnerPinView drawable size is smaller than OuterPinView on 320dpi screen device

[hendrawd]

I don't know if it is the right behavior, but i got a weird behavior here. InnerPinView drawable is seems to be smaller than OuterPinView drawable on device with 320dpi screen. The behavior is not happens for device with 480dpi or higher screen. Actually the images used for InnerPinView and OuterPinView has the same size.

Here is my XML:

<com.goldenpie.devs.pincodeview.PinCodeView
     android:id="@+id/pcv_pass_code"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_gravity="center_horizontal"
     app:pcv_pin_inner_alpha="0"
     app:pcv_pin_inner_color="@color/primary"
     app:pcv_pin_inner_drawable="@drawable/ic_pin_star"
     app:pcv_pin_outer_drawable="@drawable/ic_pin_line"
     app:pcv_pin_tint_inner="false"
     app:pcv_pin_tint_outer="false"
     app:pcv_pin_type="unlock"
     />