Some of our users are facing crashes after we updated to latest realm version. Following are the details about configuration & crash stack trace.

Project level gradle configuration
classpath "io.realm:realm-gradle-plugin:7.0.0"

App level Gradle configurations
**kapt 'androidx.databinding:databinding-compiler:4.0.0'
kapt "io.realm:realm-annotations:7.0.0"
kapt "io.realm:realm-annotations-processor:7.0.0"**

Following is the stack trace obtained from Google Crashlytics.

Fatal Exception: io.realm.exceptions.RealmError
Unrecoverable error. Key not found in /Users/cm/Realm/realm-java-release/realm/realm-library/src/main/cpp/io_realm_internal_OsResults.cpp line 475
io.realm.internal.OsResults.nativeEvaluateQueryIfNeeded (OsResults.java)
io.realm.internal.OsResults.load (OsResults.java:664)
io.realm.RealmResults.load (RealmResults.java:142)
io.realm.RealmQuery.createRealmResults (RealmQuery.java:2397)
io.realm.RealmQuery.findAll (RealmQuery.java:1778)

When our app is trying to do a findAll operation we are facing this issue.
Same crash occurred for another user which points to realm copyOrUpdate method.

What may be the cause of this issue? Can you guys help me out ?
Thanks in advance.