The dynamic participant update for workflow task assignment is not working for group membership changes.
Windchill configuration property below works only for the role member changes.
Group membership changes at later time (after the task assignment happens to the group) are not reflected in assignment of workflow tasks. Same issue when adding/removing group members. This is resulting in compliance issue when approvers who are no longer a member in respective approval group is having ability to complete/approve the task.
I think the solution to update the workitems dynamically which is available for role members should also be applicable to groups.