Failing testcase that shows wipe of all old children on save

When adding a child to a newly saved bean (A), all other children are
killed on save of A.

ebean-core/src/test/java/org/tests/cascade/TestOnlyKillOrphans.java

@@ -6,6 +6,8 @@ import org.junit.Test;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -26,6 +28,23 @@ public class TestOnlyKillOrphans extends BaseTestCase {
     DB.delete(check);
   }
 
+  @Test
+  public void test2() {
+    final COOne one = setup();
+
+    assertThat(one.getChildren()).hasSize(2);
+
+    one.getChildren().add(new COOneMany("_M1"));
+
+    DB.save(one);
+
+    // assert
+    COOne check = DB.find(COOne.class, one.getId());
+    assertThat(check.getChildren().stream().map(it -> it.getName()).sorted().collect(Collectors.toList()))
+      .isEqualTo(Stream.of("M1", "M2", "_M1").sorted().collect(Collectors.toList()));
+    DB.delete(check);
+  }
+
   private COOne setup() {
     COOne one = new COOne("P0");
     one.setChildren(createManies("M1", "M2"));