test: Fix intermittent issue in p2p_orphan_handling.py

test/functional/test_framework/test_node.py

@@ -827,7 +827,8 @@ class TestNode():
 
     def disconnect_p2ps(self):
         """Close all p2p connections to the node.
-        Use only after each p2p has sent a version message to ensure the wait works."""
+        The state of the peers (such as txrequests) may not be fully cleared
+        yet, even after this method returns."""
         for p in self.p2ps:
             p.peer_disconnect()
         del self.p2ps[:]