Unable to complete Human Task when Java Security Manager is enabled

Description of problem:

It is not possible to complete Human Task when

• two or more embedded sub processes are modelled within one main process
• Human Task is located within this embedded sub process
• Java Security Manager is enabled

Version-Release number of selected component (if applicable):
BPM Suite 6.0.2
BPM Suite 6.0.3

How reproducible:
always

Steps to Reproduce:
1. Import attached BPMN process into business-central (change task actor accordingly)
2. Start the process, claim the task, complete the task
3. Observe the exception

Actual results:

It is not possible to complete the task

Expected results:
It is possible to complete the task