diff --git a/src/api/api.ts b/src/api/api.ts
index f958f51..953802d 100644
--- a/src/api/api.ts
+++ b/src/api/api.ts
@@ -67,7 +67,6 @@ import {
   VersionControlService,
   ViewerGroup,
   ViewerSessionResponse,
-  ResetThumbRequest,
 } from "./explorer.ts";
 import { AppError, Code, CrHeaders, defaultOpts, send, ThunkResponse } from "./request.ts";
 import { CreateDavAccountService, DavAccount, ListDavAccountsResponse, ListDavAccountsService } from "./setting.ts";
@@ -293,23 +292,6 @@ export function getFileThumb(path: string, contextHint?: string): ThunkResponse<
   };
 }
 
-export function sendResetFileThumbs(req: ResetThumbRequest): ThunkResponse<void> {
-  return async (dispatch, _getState) => {
-    return await dispatch(
-      send(
-        "/file/thumb/reset",
-        {
-          data: req,
-          method: "POST",
-        },
-        {
-          ...defaultOpts,
-        },
-      ),
-    );
-  };
-}
-
 // Thin wrapper to query supported thumbnail extensions from backend
 export function getThumbExts(): ThunkResponse<{ thumb_exts?: string[] }> {
   return async (dispatch, _getState) => {
diff --git a/src/api/explorer.ts b/src/api/explorer.ts
index b7e22c5..65a6fb6 100644
--- a/src/api/explorer.ts
+++ b/src/api/explorer.ts
@@ -217,11 +217,6 @@ export interface FileThumbResponse {
   expires?: string;
 }
 
-// Request body for resetting thumbnails for given file URIs
-export interface ResetThumbRequest {
-  uris: string[];
-}
-
 export interface DeleteFileService {
   uris: string[];
   unlink?: boolean;
diff --git a/src/component/FileManager/Explorer/GalleryView/GalleryImage.tsx b/src/component/FileManager/Explorer/GalleryView/GalleryImage.tsx
index 7a87a4f..c20ca12 100644
--- a/src/component/FileManager/Explorer/GalleryView/GalleryImage.tsx
+++ b/src/component/FileManager/Explorer/GalleryView/GalleryImage.tsx
@@ -93,8 +93,11 @@ const GalleryImage = memo((props: FileBlockProps) => {
       return;
     }
 
+    // Reset to loading state before reloading thumb (e.g., after reset)
+    setImageLoading(true);
+    setThumbSrc(undefined);
     tryLoadThumbSrc();
-  }, [inView]);
+  }, [inView, file, file.metadata?.[Metadata.thumbDisabled]]);
 
   const onIconClick = useCallback(
     (e: React.MouseEvent<HTMLElement>) => {
diff --git a/src/component/FileManager/Explorer/GridView/GridFile.tsx b/src/component/FileManager/Explorer/GridView/GridFile.tsx
index 8679b90..57e7e5b 100644
--- a/src/component/FileManager/Explorer/GridView/GridFile.tsx
+++ b/src/component/FileManager/Explorer/GridView/GridFile.tsx
@@ -328,8 +328,11 @@ const GridFile = memo((props: FileBlockProps) => {
       return;
     }
 
+    // Reset to loading state before reloading thumb (e.g., after reset)
+    setImageLoading(true);
+    setThumbSrc(undefined);
     tryLoadThumbSrc();
-  }, [inView]);
+  }, [inView, file, file.metadata?.[Metadata.thumbDisabled]]);
 
   const hoverProps = bindDelayedHover(popupState, 800);
   const { open: thumbPopoverOpen, ...rest } = bindPopover(popupState);
diff --git a/src/redux/thunks/file.ts b/src/redux/thunks/file.ts
index d8ca74c..43ce170 100644
--- a/src/redux/thunks/file.ts
+++ b/src/redux/thunks/file.ts
@@ -6,7 +6,6 @@ import {
   getFileEntityUrl,
   getFileList,
   getFileThumb,
-  sendResetFileThumbs,
   sendCreateFile,
   sendDeleteFiles,
   sendMetadataPatch,
@@ -1157,7 +1156,7 @@ export function batchGetDirectLinks(index: number, files: FileResponse[]): AppTh
 }
 
 export function resetThumbnails(files: FileResponse[]): AppThunk {
-  return async (dispatch, _getState) => {
+  return async (dispatch, getState) => {
     const cache = getCachedThumbExts();
     const uris = files
       .filter((f) => f.type == FileType.file)
@@ -1177,41 +1176,39 @@ export function resetThumbnails(files: FileResponse[]): AppThunk {
     }
 
     try {
+      // Re-enable thumbnails by removing the disable mark, and update local metadata/cache.
+      const targetFiles = files
+        .filter((f) => f.type == FileType.file)
+        .filter((f) =>
+          cache === undefined || cache === null ? true : cache.has((fileExtension(f.name) || "").toLowerCase()),
+        );
+
       await dispatch(
-        sendResetFileThumbs({
-          uris,
-        }),
+        patchFileMetadata(FileManagerIndex.main, targetFiles, [
+          {
+            key: Metadata.thumbDisabled,
+            remove: true,
+          },
+        ]),
       );
 
+      // 预取：立即为所选文件请求缩略图（不依赖列表刷新或滚动触发）
+      const fm = getState().fileManager[FileManagerIndex.main];
+      const toPrefetch = targetFiles
+        .map((f) => fm.list?.files.find((ff) => ff.path === f.path) || f)
+        .filter((f): f is FileResponse => !!f);
+      // 并发触发 GET /file/thumb
+      await Promise.allSettled(toPrefetch.map((f) => dispatch(loadFileThumb(FileManagerIndex.main, f))));
+
+      // 成功信息
       enqueueSnackbar({
         message: i18next.t("application:fileManager.resetThumbnailRequested"),
         variant: "success",
         action: DefaultCloseAction,
       });
+      // 不再刷新文件列表；组件会基于metadata变化自动重新请求所选文件的缩略图
     } catch (_e) {
       // Error snackbar is handled in send()
-    } finally {
-      // Clear cached thumbnails so they will be reloaded next time
-      files
-        .filter((f) => f.type == FileType.file)
-        .forEach((f) =>
-          dispatch(
-            fileUpdated({
-              index: 0,
-              value: [
-                {
-                  file: f,
-                  oldPath: f.path,
-                },
-              ],
-            }),
-          ),
-        );
-
-      // Use the same refresh approach as uploader: refresh after a short delay
-      setTimeout(() => {
-        dispatch(refreshFileList(0));
-      }, 1000);
     }
   };
 }