That is a pretty old unreleased version of MWS. If the problem is still reproducible with the latest build, you should open a bug report with your findings.
Please include all the necessary information so that whichever R&D engineer handles this case will be expecting a clear description of the issue and any other details in order to efficiently be able to help. Providing this info in the beginning will make the process go faster.
#MWS-CAF-Task-Engine#webMethods#webMethods-BPMS