Android app crash with ResourceNotFoundException

I recently checked for my GP crash logs and I am getting this callstack very frequently. Could you please help me.

A few things:

• The failed to add asset path sometimes shows /data/app/com.xxx.xxx.xxx-x/base.apk and sometimes /mnt/asec/com.xxx.xxx.xxx-x/base.apk.
• The device android versions (where it is reported) varies from Android 4.4. to Android 7.0
• In the GP console, Android version shows Android 7.0 for all crashes but the device list has devices with Android version 6.0, 5.0, etc which is unclear.
• I have two apps with shared user Id, say with package names P1, P2. For P1, the failed to add asset path sometimes shows /data/app/P2 and sometimes /mnt/asec/P1. Isn't this incorrect and what could cause this?

Call stacks:

java.lang.RuntimeException: Unable to create BackupAgent android.app.backup.FullBackupAgent: android.content.res.Resources$NotFoundException: failed to add asset path data/app/com.P2.xxx/base.apk
    at android.app.ActivityThread.handleCreateBackupAgent(ActivityThread.java:3452)
    at android.app.ActivityThread.-wrap5(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1796)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6688)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)
Caused by: android.content.res.Resources$NotFoundException: failed to add asset path /data/app/com.P2.xxx/base.apk
    at android.app.ResourcesManager.createAssetManager(ResourcesManager.java:281)
    at android.app.ResourcesManager.createResourcesImpl(ResourcesManager.java:359)
    at android.app.ResourcesManager.getOrCreateResources(ResourcesManager.java:638)
    at android.app.ResourcesManager.getResources(ResourcesManager.java:730)
    at android.app.ActivityThread.getTopLevelResources(ActivityThread.java:2068)
    at android.app.LoadedApk.getResources(LoadedApk.java:780)
    at android.app.ContextImpl.<init>(ContextImpl.java:2244)
    at android.app.ContextImpl.createAppContext(ContextImpl.java:2184)
    at android.app.ContextImpl.createAppContext(ContextImpl.java:2175)
    at android.app.ActivityThread.handleCreateBackupAgent(ActivityThread.java:3422)

Another crash:

android.content.res.Resources$NotFoundException: failed to add asset path /mnt/asec/com.P1.xxx/base.apk
    at android.app.ResourcesManager.createAssetManager(ResourcesManager.java:281)
    at android.app.ResourcesManager.createResourcesImpl(ResourcesManager.java:359)
    at android.app.ResourcesManager.getOrCreateResources(ResourcesManager.java:638)
    at android.app.ResourcesManager.getResources(ResourcesManager.java:730)
    at android.app.ActivityThread.getTopLevelResources(ActivityThread.java:2052)
    at android.app.LoadedApk.getResources(LoadedApk.java:787)
    at android.app.ContextImpl.<init>(ContextImpl.java:2266)
    at android.app.ContextImpl.createAppContext(ContextImpl.java:2210)
    at android.app.ContextImpl.createAppContext(ContextImpl.java:2196)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5861)
    at android.app.ActivityThread.-wrap3(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1710)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    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:1520)