diff --git a/.changeset/honest-suits-approve.md b/.changeset/honest-suits-approve.md
new file mode 100644
index 0000000000..59cdb09762
--- /dev/null
+++ b/.changeset/honest-suits-approve.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-git-release-manager': patch
+---
+
+Wrap each feature in custom feature arrays with an element containing a 'key' to avoid missing-key-warnings
diff --git a/plugins/git-release-manager/src/features/Features.test.tsx b/plugins/git-release-manager/src/features/Features.test.tsx
index cdef4f0d43..28bd9b6310 100644
--- a/plugins/git-release-manager/src/features/Features.test.tsx
+++ b/plugins/git-release-manager/src/features/Features.test.tsx
@@ -41,6 +41,10 @@ describe('Features', () => {
           createRc: { omit: true },
           promoteRc: { omit: true },
           patch: { omit: true },
+          custom: {
+            // shouldn't trigger "missing key" warning in console
+            factory: () => [<div>Custom 1</div>, <div>Custom 2</div>],
+          },
         }}
       />,
     );
diff --git a/plugins/git-release-manager/src/features/Features.tsx b/plugins/git-release-manager/src/features/Features.tsx
index b8386c41cc..69b255c1ee 100644
--- a/plugins/git-release-manager/src/features/Features.tsx
+++ b/plugins/git-release-manager/src/features/Features.tsx
@@ -89,6 +89,21 @@ export function Features({
     );
   }
 
+  let CustomFeatures =
+    features?.custom?.factory({
+      latestRelease: gitBatchInfo.value.latestRelease,
+      project,
+      releaseBranch: gitBatchInfo.value.releaseBranch,
+      repository: gitBatchInfo.value.repository,
+    }) ?? null;
+  if (Array.isArray(CustomFeatures)) {
+    CustomFeatures = CustomFeatures.map((CustomFeature, index) => (
+      <React.Fragment key={`grm--custom-feature--${index}`}>
+        {CustomFeature}
+      </React.Fragment>
+    ));
+  }
+
   return (
     <RefetchContext.Provider value={{ fetchGitBatchInfo }}>
       <ErrorBoundary>
@@ -143,13 +158,7 @@ export function Features({
           />
         )}
 
-        {features?.custom?.factory &&
-          features.custom.factory({
-            latestRelease: gitBatchInfo.value.latestRelease,
-            project,
-            releaseBranch: gitBatchInfo.value.releaseBranch,
-            repository: gitBatchInfo.value.repository,
-          })}
+        {CustomFeatures}
       </ErrorBoundary>
     </RefetchContext.Provider>
   );