Fixes #1203

main/ui/src/main/java/org/cryptomator/ui/unlock/UnlockController.java

@@ -74,7 +74,7 @@ public class UnlockController implements FxController {
 		this.unlockButtonContentDisplay = Bindings.createObjectBinding(this::getUnlockButtonContentDisplay, passwordEntryLock.awaitingInteraction());
 		this.userInteractionDisabled = passwordEntryLock.awaitingInteraction().not();
 		this.unlockButtonDisabled = new SimpleBooleanProperty();
-		this.window.setOnCloseRequest(windowEvent -> close());
+		this.window.setOnCloseRequest(windowEvent -> cancel());
 	}
 
 	@FXML
@@ -128,10 +128,6 @@ public class UnlockController implements FxController {
 	@FXML
 	public void cancel() {
 		LOG.debug("Unlock canceled by user.");
-		close();
-	}
-
-	private void close() {
 		window.close();
 		passwordEntryLock.interacted(UnlockModule.PasswordEntry.CANCELED);
 	}

main/ui/src/main/java/org/cryptomator/ui/unlock/UnlockWorkflow.java

@@ -5,6 +5,7 @@ import javafx.application.Platform;
 import javafx.concurrent.Task;
 import javafx.scene.Scene;
 import javafx.stage.Stage;
+import javafx.stage.Window;
 import org.cryptomator.common.vaults.Vault;
 import org.cryptomator.common.vaults.VaultState;
 import org.cryptomator.common.vaults.Volume;
@@ -112,6 +113,11 @@ public class UnlockWorkflow extends Task<Boolean> {
 		Platform.runLater(() -> {
 			window.setScene(unlockScene.get());
 			window.show();
+			Window owner = window.getOwner();
+			if (owner != null) {
+				window.setX(owner.getX() + (owner.getWidth() - window.getWidth()) / 2);
+				window.setY(owner.getY() + (owner.getHeight() - window.getHeight()) / 2);
+			} else window.centerOnScreen();
 			if (animateShake) {
 				Animations.createShakeWindowAnimation(window).play();
 			}