fix(runtime): use unpatched parentNode as a fallback while inserting …

…newChild

src/runtime/dom-extras.ts

@@ -299,7 +299,10 @@ const patchInsertBefore = (HostElementPrototype: HTMLElement) => {
       });
       if (found) return newChild;
     }
-    return (this as d.RenderNode).__insertBefore(newChild, currentChild);
+    // If currentChild's parent is not the same node with the patched node, use the currentChild's unpatched parentNode for inserting the newChild
+    const parentNode = (currentChild as d.PatchedSlotNode)?.__parentNode;
+    const node = parentNode && !this.isSameNode(parentNode) ? parentNode : this;
+    return (node as d.RenderNode).__insertBefore(newChild, currentChild);
   };
 };