diff --git a/lib/upload-manager.js b/lib/upload-manager.js
index f583703..a4ec3e7 100644
--- a/lib/upload-manager.js
+++ b/lib/upload-manager.js
@@ -373,11 +373,14 @@ class UploadManager extends EventEmitter {
 
           if (isSpeedRestart && attempt < maxAttempts) {
             lastError = new Error('Geschwindigkeit zu niedrig - Neustart');
+            await this._sleep(3000, signal);
             continue;
           }
 
           lastError = err;
           if (attempt >= maxAttempts) break;
+          // Wait 3 seconds before retry
+          await this._sleep(3000, signal);
         } finally {
           if (speedMonitor) clearInterval(speedMonitor);
           uploadSignalBundle.cleanup();