Unity Ads on Android causes ANRs

Hi my name is Nikolas,
and I just have a game in Softlaunch in Vietnam called ZooParty. While doing the softlaunched I noticed that my only source of ANRs is unity ads related and I wanted to know if I need to subscribe to events or do something to stop these. If these ANRs keep coming I might need to switch to another AD framework because of store placing problems. I was already searching the internet and didnt find anything. The weirdest part is that I did never actually shown any ad, because of the economy which is currently to kind to the player. I hope someone here knows an answer that would be great.

Here is an example of an ANR:

"main" prio=5 tid=1 Native
  | group="main" sCount=1 dsCount=0 obj=0x762cd6e8 self=0xf0e05400
  | sysTid=9351 nice=-4 cgrp=default sched=0/0 handle=0xf406a534
  | state=S schedstat=( 0 0 0 ) utm=67 stm=37 core=2 HZ=100
  | stack=0xff02e000-0xff030000 stackSize=8MB
  | held mutexes=
  #00  pc 000000000004a468  /system/lib/libc.so (nanosleep+12)
  #01  pc 0000000000a73dec  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libunity.so (???)
  #02  pc 00000000004531ac  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libunity.so (???)
  #03  pc 000000000023dadc  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libmonobdwgc-2.0.so (mono_chain_signal+136)
  #04  pc 0000000000060808  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libmonobdwgc-2.0.so (???)
  #05  pc 000000000043e47d  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libmonobdwgc-2.0.so (???)
  #06  pc 00000000000087c1  /system/bin/app_process32 (InvokeUserSignalHandler+156)
  #07  pc 000000000014aba3  /system/lib/libart.so (_ZN3art12FaultManager11HandleFaultEiP7siginfoPv+222)
  #08  pc 00000000000171d0  /system/lib/libc.so (???)
  #09  pc 0000000000865b08  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libunity.so (???)
  #10  pc 0000000000865ba8  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libunity.so (???)
  #11  pc 0000000000a04b6c  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libunity.so (???)
  #12  pc 00000000001ae37c  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libunity.so (???)
  #13  pc 00000000001ae2e4  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libunity.so (???)
  #14  pc 00000000001ae100  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libunity.so (???)
  #15  pc 000000000011fe4c  /data/app/com.PartTimeIndie.ZooParty-1/lib/arm/libunity.so (???)
  #16  pc 00000000000571c9  /data/app/com.PartTimeIndie.ZooParty-1/oat/arm/base.odex (Java_com_unity3d_player_ReflectionHelper_nativeProxyInvoke__ILjava_lang_String_2_3Ljava_lang_Object_2+132)
  at com.unity3d.player.ReflectionHelper.nativeProxyInvoke (Native method)
  at com.unity3d.player.ReflectionHelper.a (unavailable)
  at com.unity3d.player.ReflectionHelper$1.invoke (unavailable)
  at java.lang.reflect.Proxy.invoke (Proxy.java:813)
  at com.unity3d.ads.IUnityAdsListener.onUnityAdsReady (IUnityAdsListener.java)
  at com.unity3d.ads.api.Listener$1.run (Listener.java:17)
  at android.os.Handler.handleCallback (Handler.java:751)
  at android.os.Handler.dispatchMessage (Handler.java:95)
  at android.os.Looper.loop (Looper.java:154)
  at android.app.ActivityThread.main (ActivityThread.java:6776)
  at java.lang.reflect.Method.invoke! (Native method)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1496)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1386)
"Jit thread pool worker thread 0" tid=2 Native 
"ReferenceQueueDaemon" tid=4 Waiting 
"FinalizerDaemon" tid=5 Waiting 
"FinalizerWatchdogDaemon" tid=6 Waiting 
"Binder:9351_1" tid=8 Native 
"Binder:9351_2" tid=9 Native 
"Profile Saver" tid=10 Native 
"UnityMain" tid=11 Native 
"Binder:9351_3" tid=12 Native 
"pool-1-thread-1" tid=13 Waiting 
"UnityAdsWebRequestThread" tid=16 Native 
"Okio Watchdog" tid=17 Waiting 
"OkHttp ConnectionPool" tid=18 TimedWaiting 
"GAC_Executor[0]" tid=19 Waiting 
"UnityChoreographer" tid=20 Native 
"GoogleApiHandler" tid=21 Native 
"Chrome_IOThread" tid=22 Native 
"CleanupReference" tid=26 Waiting 
"GAC_Executor[0]" tid=27 Waiting 
"ConnectivityManager" tid=28 Native 
"AudioThread" tid=29 Native 
"Chrome_InProcGpuThread" tid=30 Native 
"Chrome_InProcRendererThread" tid=31 Native 
"TaskSchedulerFo" tid=32 Native 
"JavaBridge" tid=33 Native 
"GAC_Executor[1]" tid=34 Waiting 
"RenderThread" tid=35 Native 
"GAC_Executor[1]" tid=36 Waiting 
"Binder:9351_4" tid=38 Native 
"Signal Catcher" tid=3 Runnable 
"HeapTaskDaemon" tid=7 Blocked

Is there noone that can help? Is the unity team on this problem? Seems like I am not the only one interested in this topic (215 people are following this questions).

I have the same problem. This problem has existed for a long time and it seems that unity does not care about it. So I also noticed that it occurs only on the 64-bit assembly IL2CPP.
2019.3.0f6