diff --git a/src/scripts/proxyWidget.ts b/src/scripts/proxyWidget.ts
index 0cbe72e415..7927a3723f 100644
--- a/src/scripts/proxyWidget.ts
+++ b/src/scripts/proxyWidget.ts
@@ -30,7 +30,7 @@ SubgraphNode.prototype.onConfigure = function (serialisedNode) {
     set: (property: string) => {
       const parsed = parseProxyWidgets(property)
       const { widgetStates } = useDomWidgetStore()
-      for (const w of subgraphNode.widgets ?? []) {
+      for (const w of subgraphNode.widgets.filter((w) => isProxyWidget(w))) {
         if (w instanceof DOMWidgetImpl && widgetStates.has(w.id)) {
           const widgetState = widgetStates.get(w.id)
           if (!widgetState) continue