[Android] Application crashes with "FATAL EXCEPTION"

Crashes were automatically reported on different devices into Google Play Console

java.lang.Error: FATAL EXCEPTION [main]

at android.app.FragmentManagerImpl.checkStateLoss (FragmentManager.java:1436)
at android.app.FragmentManagerImpl.enqueueAction (FragmentManager.java:1454)
at android.app.BackStackRecord.commitInternal (BackStackRecord.java:708)
at android.app.BackStackRecord.commit (BackStackRecord.java:672)
at net.gree.unitywebview.CWebViewPlugin$2.run (CWebViewPlugin.java:217)
at android.os.Handler.handleCallback (Handler.java:754)
at android.os.Handler.dispatchMessage (Handler.java:95)
at android.os.Looper.loop (Looper.java:163)
at android.app.ActivityThread.main (ActivityThread.java:6379)
at java.lang.reflect.Method.invoke (Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:794)

Unity version: 2019.4.2f1
Android version: vary, including 5.1, 6.0, 7.1, 8.1, 9, 10
Plugin version: around 2020-05-20

Start with the Android stack trace and inspect CWebViewPlugin.java around line 217, where FragmentManager.commit is called. Reproduce the crash across the reported Android versions if possible and verify that the reported FATAL EXCEPTION no longer occurs; no test file is named.