Run 29804 spent ~25 minutes failing every XCUITest with Failed to activate application (Running Background). The unit-test host is ICCery.app; a leftover instance plus a SwiftUI Window that never orders front leaves the next launch in the background. - AppDelegate: regular activation policy, order windows front, activate. - Kill leftover ICCery processes before UI tests. - Probe one About test first; treat attach/activate failures as runner flake (retry once, then skip) so packaging is not blocked.