You administer GitHub Copilot for an organization. A team lead asks you to prevent Copilot from using the contents of a specific repository (containing sensitive configuration files) as context for suggestions, both in the IDE and in Copilot Chat. You configure a content exclusion rule scoped to that repository. After saving the rule, a developer reports that they still received an inline suggestion that appeared to reference an excluded file minutes after you applied the setting. What is the most accurate explanation of this behavior?