Unity3D - ANR与谷歌移动广告SDK

Question

Googleplay正在展示由GoogleMobileAds引起的很多ANR。我通过Heyzap Mediation使用Admob。我曾尝试联系Admob支持和Heyzap支持，但没有收到有关此ANR的任何回复。

使用： - Unity 2018.1.1 - Play Services V 12.1.0 - 目标API级别27

ANR

"main" prio=5 tid=1 Native
  | group="main" sCount=1 dsCount=0 obj=0x73950000 self=0xb5007800
  | sysTid=12754 nice=-6 cgrp=apps sched=0/0 handle=0xb6fc9ec8
  | state=S schedstat=( 0 0 0 ) utm=138 stm=65 core=2 HZ=100
  | stack=0xbe19f000-0xbe1a1000 stackSize=8MB
  | held mutexes=

  #00  pc 0000000000012eac  /system/lib/libc.so (syscall+28)

  #01  pc 00000000000a96fb  /system/lib/libart.so (art::ConditionVariable::Wait(art::Thread*)+82)

  #02  pc 00000000001acf71  /system/lib/libart.so (art::JNI::SetLongField(_JNIEnv*, _jobject*, _jfieldID*, long long)+524)

  #03  pc 0000000000085c51  /system/lib/libandroid_runtime.so (???)

  #04  pc 0000000000085fe1  /system/lib/libandroid_runtime.so (???)

  #05  pc 00000000000003d3  /data/dalvik-cache/arm/system@framework@boot.oat (Java_android_os_Binder_init__+82)

  at android.os.Binder.init (Native method)

  at android.os.Binder.<init> (Binder.java:216)

  at com.google.android.gms.internal.zzew.<init> (unavailable)

  at com.google.android.gms.internal.zzwg.<init> (unavailable)

  at com.google.android.gms.internal.zzwe.<init> (unavailable)

  at com.google.android.gms.internal.zzmz.getRewardedVideoAdInstance (unavailable)
- locked <@addr=0x130fcbc0> (a java.lang.Object)

  at com.google.android.gms.ads.MobileAds.getRewardedVideoAdInstance (unavailable)

  at com.heyzap.sdk.mediation.adapter.AdmobAdapter.onStart (AdmobAdapter.java:139)

  at com.heyzap.mediation.abstr.NetworkAdapter$1.run (NetworkAdapter.java:105)

  at com.heyzap.common.concurrency.WrappedRunnable.run (WrappedRunnable.java:26)

  at com.heyzap.common.concurrency.HandlerExecutorService$2.run (HandlerExecutorService.java:59)

  at android.os.Handler.handleCallback (Handler.java:739)

  at android.os.Handler.dispatchMessage (Handler.java:95)

  at android.os.Looper.loop (Looper.java:135)

  at android.app.ActivityThread.main (ActivityThread.java:5311)

  at java.lang.reflect.Method.invoke! (Native method)

  at java.lang.reflect.Method.invoke (Method.java:372)

  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:908)

  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:703)