Why might changes to an Engagement Plan Template not be visible in an existing Engagement Plan?

The reason changes to an Engagement Plan Template might not be visible in an existing Engagement Plan is that template changes only apply to new Engagement Plans created after the modifications. When you update a template, those alterations are meant to guide future plans but do not retroactively adjust existing plans. Each Engagement Plan takes a snapshot of the template at the moment it is created, meaning any subsequent changes would not affect those already in place. This design helps maintain stability and consistency in previously established plans while allowing for flexibility and updates in new instances.

In contrast, other options suggest reasons that do not accurately reflect how the system functions regarding templates and existing plans. Permissions issues or the need for changes to propagate throughout the system do not align with the mechanics of how template alterations apply. Likewise, user acceptance of changes is not a requirement for template modifications to take effect on new creations.