Faced a strange options menu behavior on Android M.
Menu shadow is implemented with 9 patch and works perfect on previous Android versions. But on sixth Android it appears only for a while. Also it look like it appears for a while during close animation. Menu style is below:
<style name="PopupMenu" parent="Widget.AppCompat.Light.PopupMenu">
<item name="android:popupBackground">@drawable/shadow</item>
<item name="android:overlapAnchor">true</item>
</style>
Will be thankful for any help in fixing this shadows visibility issue.