diff --git a/modules/rnetwork/components/folk-graph-viewer.ts b/modules/rnetwork/components/folk-graph-viewer.ts
index fc1b4fe..b3860ec 100644
--- a/modules/rnetwork/components/folk-graph-viewer.ts
+++ b/modules/rnetwork/components/folk-graph-viewer.ts
@@ -545,6 +545,13 @@ class FolkGraphViewer extends HTMLElement {
 			const ForceGraph3D = (window as any).ForceGraph3D;
 			if (!ForceGraph3D) throw new Error("ForceGraph3D not loaded — check UMD script tag");
 
+			// Pre-load THREE so nodeThreeObject callback is synchronous.
+			// Import from the same module the UMD build uses internally
+			// to avoid "not an instance of THREE.Object3D" errors.
+			const THREE = await import("three");
+			this._threeModule = THREE;
+			(window as any).__THREE_CACHE__ = THREE;
+
 			const graph = ForceGraph3D({ controlType: "orbit" })(container)
 				.backgroundColor("rgba(0,0,0,0)")
 				.showNavInfo(false)