diff --git a/packages/backend/native/src/runtime/backend_runtime/copilot/context.rs b/packages/backend/native/src/runtime/backend_runtime/copilot/context.rs
index af0943f6ee..05d6b977ec 100644
--- a/packages/backend/native/src/runtime/backend_runtime/copilot/context.rs
+++ b/packages/backend/native/src/runtime/backend_runtime/copilot/context.rs
@@ -248,9 +248,12 @@ fn managed_endpoint(profile: &CopilotManagedProfileConfig) -> RuntimeResult<Back
       } else {
         "anthropic"
       };
-      format!(
-        "https://{location}-aiplatform.googleapis.com/v1/projects/{project}/locations/{location}/publishers/{publisher}"
-      )
+      let host = if location == "global" {
+        "aiplatform.googleapis.com".to_string()
+      } else {
+        format!("{location}-aiplatform.googleapis.com")
+      };
+      format!("https://{host}/v1/projects/{project}/locations/{location}/publishers/{publisher}")
     }
     "cloudflareWorkersAi" => format!(
       "https://api.cloudflare.com/client/v4/accounts/{}/ai",
@@ -311,3 +314,41 @@ pub(super) fn required_config_text<'a>(
     .filter(|value| !value.trim().is_empty())
     .ok_or_else(|| RuntimeError::invalid_state(format!("managed copilot profile requires {field}")))
 }
+
+#[cfg(test)]
+mod tests {
+  use serde_json::json;
+
+  use super::{BackendEndpoint, CopilotManagedProfileConfig, managed_endpoint};
+
+  fn vertex_profile(location: &str) -> CopilotManagedProfileConfig {
+    CopilotManagedProfileConfig {
+      id: "vertex".to_string(),
+      provider: "geminiVertex".to_string(),
+      enabled: true,
+      models: vec!["gemini-3.6-flash".to_string()],
+      config: json!({ "project": "affine-us", "location": location }),
+    }
+  }
+
+  #[test]
+  fn managed_vertex_endpoint_uses_global_host() {
+    assert_eq!(
+      managed_endpoint(&vertex_profile("global")).unwrap(),
+      BackendEndpoint::Custom(
+        "https://aiplatform.googleapis.com/v1/projects/affine-us/locations/global/publishers/google".to_string()
+      )
+    );
+  }
+
+  #[test]
+  fn managed_vertex_endpoint_uses_regional_host() {
+    assert_eq!(
+      managed_endpoint(&vertex_profile("us-central1")).unwrap(),
+      BackendEndpoint::Custom(
+        "https://us-central1-aiplatform.googleapis.com/v1/projects/affine-us/locations/us-central1/publishers/google"
+          .to_string()
+      )
+    );
+  }
+}
diff --git a/packages/frontend/core/src/modules/media/entities/audio-attachment-block.ts b/packages/frontend/core/src/modules/media/entities/audio-attachment-block.ts
index 062c52c748..8eb4fea2ef 100644
--- a/packages/frontend/core/src/modules/media/entities/audio-attachment-block.ts
+++ b/packages/frontend/core/src/modules/media/entities/audio-attachment-block.ts
@@ -169,8 +169,8 @@ export class AudioAttachmentBlock extends Entity<AttachmentBlockModel> {
 
   readonly transcribe = async () => {
     try {
-      // if job is already running, we should not start it again
-      if (this.transcriptionJob.status$.value.status !== 'waiting-for-job') {
+      const initialStatus = this.transcriptionJob.status$.value.status;
+      if (initialStatus !== 'waiting-for-job' && initialStatus !== 'failed') {
         return;
       }
       const status = await this.transcriptionJob.start();