Navigate authoritative FXML locations, withdraw stale results and preserve host Undo/Redo. Include editor ownership in native problem identity so equal diagnostics from separate owners survive independent cleanup. Qualify both hosts automatically.
Early Platform.exit detached JavaFX while queued macOS activation callbacks still called Java. Close the owned example before terminating its JVM, make shutdown idempotent, and reject late preview work. Add real startup-cancellation regressions and native crash-report checks.
konrad