Suspected threading issues when using JaversAuditableAuditAsync - javers

Question

I am using Javers with Spring Hibernate JPA. The primary database is a MYSQL database with Javers connected to a seperate MongoDB server. I am not using Spring Data.
Everything works great with JaversAuditableAspect but I get the below errors when I use JaversAuditableAspectAsync.
I am using the default setup for the Async Javers.
#Bean
public JaversAuditableAspectAsync javersAuditableAspectAsync() {
return new JaversAuditableAspectAsync(javers(), authorProvider(), new EmptyPropertiesProvider(), javersAsyncAuditExecutor());
}
#Bean
public ExecutorService javersAsyncAuditExecutor() {
ThreadFactory threadFactory = new ThreadFactoryBuilder()
.setNameFormat("JaversAuditableAsync-%d")
.build();
return Executors.newFixedThreadPool(2, threadFactory);
}
I understand this is an experimental feature but performance is very important in the area I intend to use Javers. Any advice on this would be greatly appreciated.
Errors upon first change attempt:
2020-07-29 10:54:35:497 [asdf#asdf.com E6DD9F] ERROR
DefaultRestExceptionHandler.defaultErrorHandler:120 - Error invoking '/service/form/save'. Exception: org.springframework.transaction.TransactionSystemException. Message: Could not commit JPA transaction; nested exception is javax.persistence.RollbackException: Error while committing the transaction.
org.springframework.transaction.TransactionSystemException: Could not commit JPA transaction; nested exception is javax.persistence.RollbackException: Error while committing the transaction
Caused by: javax.persistence.RollbackException: Error while committing the transaction
Caused by: java.util.ConcurrentModificationException: null
Errors upon 2nd or more attempts:
2020-07-29 11:24:48:311 [asdf#asdf.com CD065A] ERROR DefaultRestExceptionHandler.defaultErrorHandler:120 - Error invoking '/service/form/save'. Exception: java.util.ConcurrentModificationException. Message: null.
java.util.ConcurrentModificationException: null