Only update selected if different from current

src/js/app.tsx

@@ -64,9 +64,11 @@ export class App extends React.Component<AppProps, AppState> {
     }
 
     updateSelect(selected: string): void {
-        this.setState((state) => {
-            return { streamList: state.streamList, selectedStream: selected }
-        })
+        if (selected !== this.state.selectedStream) {
+            this.setState((state) => {
+                return { streamList: state.streamList, selectedStream: selected }
+            })
+        }
     }
 
     render() {