If you use EJB services, manage transactions yourself and deploy your application on WebSphere or WebLogic, you will encounter problem when getting tasks created by a process started in the same transaction which has not been committed yet.

This worked before the logic behind getting tasks was changed because of RHBPMS-4548.

The following test fails on the highlighted line (when run on WebSphere or WebLogic):
https://github.com/kiegroup/jbpm/blob/e3f7113ea086ba63275bf4b64a4659cb97d138b5/jbpm-container-test/jbpm-container-test-suite/src/test/java/org/jbpm/test/container/test/ejbservices/tx/ETransactionTest.java#L292

Note that although this is a regression, it is a very specific use case and it is possible that nobody uses it this way.