From 9d6ad5be70d2b69150dc667ecfa862651c3a7a57 Mon Sep 17 00:00:00 2001
From: Hiroshi Horie <548776+hiroshihorie@users.noreply.github.com>
Date: Mon, 23 Mar 2026 21:10:38 +0900
Subject: [PATCH 1/2] impl 1

---
 lib/src/core/engine.dart | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/src/core/engine.dart b/lib/src/core/engine.dart
index 3f9d02b8c..d5c113cbc 100644
--- a/lib/src/core/engine.dart
+++ b/lib/src/core/engine.dart
@@ -15,6 +15,7 @@
 // ignore_for_file: deprecated_member_use_from_same_package
 
 import 'dart:async';
+import 'dart:math' as math;
 import 'dart:typed_data' show Uint8List;
 
 import 'package:flutter/foundation.dart' show kDebugMode, kIsWeb;
@@ -1013,7 +1014,11 @@ class Engine extends Disposable with EventsEmittable<EngineEvent> {
       return;
     }
 
-    final delay = defaultRetryDelaysInMs[reconnectAttempts!];
+    var delay = defaultRetryDelaysInMs[reconnectAttempts!];
+    // Add random jitter to prevent thundering herd on reconnect
+    if (reconnectAttempts! > 1) {
+      delay += math.Random().nextInt(1000);
+    }
 
     events.emit(EngineAttemptReconnectEvent(
       attempt: reconnectAttempts! + 1,

From 15d2e7fe88a860bd8911d9358201dbc5644c528f Mon Sep 17 00:00:00 2001
From: Hiroshi Horie <548776+hiroshihorie@users.noreply.github.com>
Date: Mon, 23 Mar 2026 21:11:59 +0900
Subject: [PATCH 2/2] Create reconnect-jitter

---
 .changes/reconnect-jitter | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 .changes/reconnect-jitter

diff --git a/.changes/reconnect-jitter b/.changes/reconnect-jitter
new file mode 100644
index 000000000..11cc00a12
--- /dev/null
+++ b/.changes/reconnect-jitter
@@ -0,0 +1 @@
+patch type="fixed" "Add jitter to reconnect retry delays"