diff --git a/app/Jobs/Machine/ProcessCommandAck.php b/app/Jobs/Machine/ProcessCommandAck.php
index b6e074e..9962467 100644
--- a/app/Jobs/Machine/ProcessCommandAck.php
+++ b/app/Jobs/Machine/ProcessCommandAck.php
@@ -79,6 +79,19 @@ class ProcessCommandAck implements ShouldQueue
             return;
         }
 
+        // OTA 更新例外處理：APK 下載/安裝為長時程作業，機台會持續回報「進度」ACK
+        // (result="progress"，如「Downloading 45%」「Installing...」)。這些屬於過程回報，
+        // 不可視為終態，否則指令會在「剛開始下載」就被標記完成，與機台實際版本不符。
+        // 僅將進度文字寫入 note 供後台檢視，並保持 pending，等待最終 success/failed。
+        if ($command->command_type === 'update_app' && $resultCode === 'progress') {
+            $command->update(['note' => $this->payload['message'] ?? $command->note]);
+            Log::info('MQTT CommandAck: update_app progress (kept pending)', [
+                'command_id' => $commandId,
+                'message' => $this->payload['message'] ?? null,
+            ]);
+            return;
+        }
+
         // 判定執行結果 (result: "success" 或 "0" 代表成功)
         $status = in_array($resultCode, ['success', '0'], true) ? 'success' : 'failed';