Avoid saving more than once in new Paragraphs

+++ b/tests/src/Kernel/ParagraphsCompositeRelationshipTest.php
@@ -137,7 +137,9 @@ class ParagraphsCompositeRelationshipTest extends KernelTestBase {
     ]);
+    $paragraph3->setNeedsSave(TRUE);
     $paragraph3->save();
+    $this->assertFalse($paragraph3->needsSave());
     // Create another paragraph.

I'd prefer a separate test block, with a comment that explains what we are testing instead of stuffing it into some existing logic.

You can keep it in this test, just do it at the end.

Committed, moooarrrr performance!

Still back to needs work as this fix should (also) be at ERR project in the corresponding trait.