The Simulation option within a Process Flow should simulate the running on the Process Flow based on Process Flow components' predecessor information.
However, if a Process Flow has another Process Flow as an external Reference, the simulation may show that both the Process Flow and external Process Flow runs at the same time, when the expected and actual behavior is that they run one after the other.
This does not affect actual behavior.
defect in code
A fix will be included in Applications Manager version 9.6.2 and 9.7.