It looks like there is a data race between the state transfer thread and a concurrent transaction in EntryWrappingInterceptor.commitEntryIfNeeded:

tx: commitContextEntry()
ST: stateConsumer.isKeyUpdated(k)? false
tx: stateConsumer.addUpdatedKey(k)
ST: commitContextEntry()

We probably need some synchronization here, maybe using EquivalentConcurrentHashMapV8.computeIfAbsent().