diff --git a/api/core/sandbox/initializer/app_assets_attrs_loader.py b/api/core/sandbox/initializer/app_assets_attrs_loader.py
new file mode 100644
index 0000000000..32efd41254
--- /dev/null
+++ b/api/core/sandbox/initializer/app_assets_attrs_loader.py
@@ -0,0 +1,16 @@
+from core.app_assets.constants import AppAssetsAttrs
+from core.sandbox.initializer.base import SandboxInitializer
+from core.sandbox.sandbox import Sandbox
+from services.app_asset_service import AppAssetService
+
+
+class AppAssetsAttrsInitializer(SandboxInitializer):
+    def __init__(self, tenant_id: str, app_id: str, assets_id: str) -> None:
+        self._tenant_id = tenant_id
+        self._app_id = app_id
+        self._assets_id = assets_id
+
+    def initialize(self, env: Sandbox) -> None:
+        # Load published app assets and unzip the artifact bundle.
+        app_assets = AppAssetService.get_tenant_app_assets(self._tenant_id, self._assets_id)
+        env.attrs.set(AppAssetsAttrs.FILE_TREE, app_assets.asset_tree)
diff --git a/api/core/sandbox/initializer/app_assets_initializer.py b/api/core/sandbox/initializer/app_assets_initializer.py
index 8a464178a3..e0a94a41e9 100644
--- a/api/core/sandbox/initializer/app_assets_initializer.py
+++ b/api/core/sandbox/initializer/app_assets_initializer.py
@@ -1,12 +1,10 @@
 import logging
 
-from core.app_assets.constants import AppAssetsAttrs
 from core.app_assets.paths import AssetPaths
 from core.sandbox.sandbox import Sandbox
 from core.virtual_environment.__base.helpers import pipeline
 from extensions.ext_storage import storage
 from extensions.storage.file_presign_storage import FilePresignStorage
-from services.app_asset_service import AppAssetService
 
 from ..entities import AppAssets
 from .base import SandboxInitializer
@@ -24,10 +22,6 @@ class AppAssetsInitializer(SandboxInitializer):
 
     def initialize(self, env: Sandbox) -> None:
         vm = env.vm
-        # Load published app assets and unzip the artifact bundle.
-        app_assets = AppAssetService.get_tenant_app_assets(self._tenant_id, self._assets_id)
-        env.attrs.set(AppAssetsAttrs.FILE_TREE, app_assets.asset_tree)
-
         zip_key = AssetPaths.build_zip(self._tenant_id, self._app_id, self._assets_id)
         download_url = FilePresignStorage(storage.storage_runner).get_download_url(zip_key)
 
@@ -51,3 +45,6 @@ class AppAssetsInitializer(SandboxInitializer):
             self._app_id,
             self._assets_id,
         )
+
+    def async_initialize(self) -> bool:
+        return True
diff --git a/api/core/sandbox/initializer/dify_cli_initializer.py b/api/core/sandbox/initializer/dify_cli_initializer.py
index 0ac218bcb6..cde75be3d1 100644
--- a/api/core/sandbox/initializer/dify_cli_initializer.py
+++ b/api/core/sandbox/initializer/dify_cli_initializer.py
@@ -82,3 +82,6 @@ class DifyCliInitializer(SandboxInitializer):
         ).execute(raise_on_error=True)
 
         logger.info("Global tools initialized, path=%s, tool_count=%d", DifyCli.GLOBAL_TOOLS_PATH, len(self._tools))
+
+    def async_initialize(self) -> bool:
+        return True
diff --git a/api/core/sandbox/initializer/draft_app_assets_initializer.py b/api/core/sandbox/initializer/draft_app_assets_initializer.py
index ac05e5e51f..18b022b028 100644
--- a/api/core/sandbox/initializer/draft_app_assets_initializer.py
+++ b/api/core/sandbox/initializer/draft_app_assets_initializer.py
@@ -1,6 +1,5 @@
 import logging
 
-from core.app_assets.constants import AppAssetsAttrs
 from core.sandbox.entities import AppAssets
 from core.sandbox.sandbox import Sandbox
 from core.sandbox.services import AssetDownloadService
@@ -24,8 +23,8 @@ class DraftAppAssetsInitializer(SandboxInitializer):
     def initialize(self, env: Sandbox) -> None:
         vm = env.vm
         # Draft assets download via presigned URLs to avoid zip build overhead.
+        # FIXME(Yeuoly): merge 2 IO operations in DraftAppAssetsInitializer and AppAssetsAttrsInitializer
         app_assets = AppAssetService.get_tenant_app_assets(self._tenant_id, self._assets_id)
-        env.attrs.set(AppAssetsAttrs.FILE_TREE, app_assets.asset_tree)
 
         items = [
             AssetDownloadItem(path=path, url=url)
@@ -42,3 +41,6 @@ class DraftAppAssetsInitializer(SandboxInitializer):
             self._app_id,
             self._assets_id,
         )
+
+    def async_initialize(self) -> bool:
+        return True