diff --git a/src/panels/lovelace/editor/hui-element-editor.ts b/src/panels/lovelace/editor/hui-element-editor.ts
index 4f0483c659..0f08a36f94 100644
--- a/src/panels/lovelace/editor/hui-element-editor.ts
+++ b/src/panels/lovelace/editor/hui-element-editor.ts
@@ -271,6 +271,11 @@ export abstract class HuiElementEditor<T> extends LitElement {
   private _handleUIConfigChanged(ev: UIConfigChangedEvent) {
     ev.stopPropagation();
     const config = ev.detail.config;
+    Object.keys(config).forEach((key) => {
+      if (config[key] === undefined) {
+        delete config[key];
+      }
+    });
     this.value = config as unknown as T;
   }