ContentProvider in dynamic module

[pendai]

I have declared ContentProvider in my dynamic module's manifest 。 this would result in ClassNotFoundException.(bad english)
<dist:module
dist:instant="false"
dist:title="@string/title">
dist:delivery
<dist:install-time >
dist:conditions
<dist:user-countries dist:exclude="false">
<dist:country dist:code="JP"/>
</dist:user-countries>
</dist:conditions>
</dist:install-time>
</dist:delivery>
<dist:fusing dist:include="false" />
</dist:module>

trace:
    java.lang.RuntimeException: Unable to get provider com.exp.initializer.MobileInitializeProvider: java.lang.ClassNotFoundException: Didn't find class "com.exp.initializer.MobileInitializeProvider" on path: DexPathList[[zip file "/data/app/com.block.puzzle.game.wooden-s38mQmfCLB4I1rmGAkXfDg==/base.apk", zip file "/data/app/com.block.puzzle.game.wooden-s38mQmfCLB4I1rmGAkXfDg==/split_config.arm64_v8a.apk"],nativeLibraryDirectories=[/data/app/com.block.puzzle.game.wooden-s38mQmfCLB4I1rmGAkXfDg==/lib/arm64, /data/app/com.block.puzzle.game.wooden-s38mQmfCLB4I1rmGAkXfDg==/base.apk!/lib/arm64-v8a, /data/app/com.block.puzzle.game.wooden-s38mQmfCLB4I1rmGAkXfDg==/split_config.arm64_v8a.apk!/lib/arm64-v8a, /system/lib64, /product/lib64]]
    at android.app.ActivityThread.installProvider(ActivityThread.java:7191)
    at android.app.ActivityThread.installContentProviders(ActivityThread.java:6669)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6586)
    at android.app.ActivityThread.access$1500(ActivityThread.java:233)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1914)
    at android.os.Handler.dispatchMessage(Handler.java:107)
    at android.os.Looper.loop(Looper.java:224)
    at android.app.ActivityThread.main(ActivityThread.java:7561)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:995)

[pendai]