Automatic labeling trumps manual label selection
Once ruleset are configured and the AIP policy is running the background files should always be labeled using the configured rulesets. Currently when a user manually selects a label that selection is final and even the policy running in the background cannot change that.
If a business is configuring a ruleset then that should prevail every time sensitive content is detected.
Most customers have expressed that this is not desired behavior, can you explain the scenario further?