BottomBar not update position when SystemNav bar hidden

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The BottomBar should but not auto update when System navigation bar changed from show to hidden on HuaWei device, EMUI5.1, Android7.0.

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Reproduce video: https://youtu.be/mQsPSeeYImk

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I used the underNavbar behavior:

 app:bb_behavior="underNavbar"

and styled:

<style name="AppTheme.TransNav" parent="AppTheme">
    <item name="android:navigationBarColor">@android:color/transparent</item>
    <item name="android:windowTranslucentNavigation">true</item>
    <item name="android:windowDrawsSystemBarBackgrounds">true</item>
</style>