PSA: Why are the Project Task Assignment Date Changes Not Updating the Assignment Dates?
Project Task Assignment date changes may not update the assignment dates. This occurs if a specific configuration option, 'use-task-based-schedule-creation-strategy', is set to "false". To ensure date changes update the scheduled hours and dates, this setting must be set to "true". Additionally, edits will be ignored if a resource is scheduled for 24 hours or more in a single day.