fix(4.0.0-beta.1): fix backwards compatibility with req_id usage for ws subscribe/unsubscribe

src/websocket-client.ts

@@ -550,10 +550,18 @@ export class WebsocketClient extends BaseWebsocketClient<
 
     switch (market) {
       case 'all': {
+        const topics = requests.map((r) => r.topic);
+
+        // Previously used to track topics in a request. Keeping this for subscribe/unsubscribe requests, no need for incremental values
+        const req_id =
+          ['subscribe', 'unsubscribe'].includes(operation) && topics.length
+            ? topics.join('_')
+            : this.getNewRequestId();
+
         const wsEvent: WsRequestOperationBybit<WsTopic> = {
-          req_id: this.getNewRequestId(),
+          req_id: req_id,
           op: operation,
-          args: requests.map((r) => r.topic),
+          args: topics,
         };
 
         const midflightWsEvent: MidflightWsRequestEvent<