diff --git a/js/src/common/components/SharedFileList.tsx b/js/src/common/components/SharedFileList.tsx
index a6e38a9a..a10462e4 100644
--- a/js/src/common/components/SharedFileList.tsx
+++ b/js/src/common/components/SharedFileList.tsx
@@ -4,6 +4,9 @@ import AbstractFileList from './AbstractFIleList';
 
 export default class SharedFileList extends AbstractFileList {
   public loadFileList(): void {
+    // Mirror UserFileList's setUser guard: skip if already loaded or a fetch is in flight,
+    // otherwise rapid tab toggling fires concurrent requests and parseResults concats duplicates.
+    if (this.fileState.files.length > 0 || this.fileState.isLoading()) return;
     this.fileState.loadResults();
   }
 
diff --git a/js/src/common/states/FileListState.ts b/js/src/common/states/FileListState.ts
index cb1e36f6..a5b60781 100644
--- a/js/src/common/states/FileListState.ts
+++ b/js/src/common/states/FileListState.ts
@@ -66,9 +66,16 @@ export default class FileListState {
       } as ApiQueryParamsPlural;
     }
 
-    const results = await app.store.find<File[]>(route, params);
-
-    return this.parseResults(results);
+    try {
+      const results = await app.store.find<File[]>(route, params);
+      return this.parseResults(results);
+    } catch (error) {
+      // Ensure loading is reset on failure so consumers (e.g. SharedFileList's loadFileList guard)
+      // can detect that the previous attempt finished and a retry is allowed.
+      this.loading = false;
+      m.redraw();
+      throw error;
+    }
   }
 
   /**