The plan appears to lock peggings from consuming Tasks to the Production KPI of the newly planned Task, but does not lock peggings from the Usage KPIs of the newly planned Task to other Tasks that produce the required materials/components.
Also, the plan is not refreshing correctly after planning a Task, so that Colour by: Locked Pegging is not displaying the correct information until something else triggers a refresh.
The functionality has been enhanced in Orchestrate version 7.69. Please upgrade to this version or above.