diff --git a/x-pack/plugins/ml/public/application/data_frame_analytics/pages/analytics_creation/hooks/use_index_data.ts b/x-pack/plugins/ml/public/application/data_frame_analytics/pages/analytics_creation/hooks/use_index_data.ts
index 87dd6709e82f4..3118ce7c91a93 100644
--- a/x-pack/plugins/ml/public/application/data_frame_analytics/pages/analytics_creation/hooks/use_index_data.ts
+++ b/x-pack/plugins/ml/public/application/data_frame_analytics/pages/analytics_creation/hooks/use_index_data.ts
@@ -125,9 +125,9 @@ export const useIndexData = (
       // Get all field names for each returned doc and flatten it
       // to a list of unique field names used across all docs.
       const allKibanaIndexPatternFields = getFieldsFromKibanaIndexPattern(indexPattern);
-      const populatedFields = [...new Set(docs.map(Object.keys).flat(1))].filter((d) =>
-        allKibanaIndexPatternFields.includes(d)
-      );
+      const populatedFields = [...new Set(docs.map(Object.keys).flat(1))]
+        .filter((d) => allKibanaIndexPatternFields.includes(d))
+        .sort();
 
       setStatus(INDEX_STATUS.LOADED);
       setIndexPatternFields(populatedFields);
diff --git a/x-pack/plugins/transform/public/app/hooks/use_index_data.ts b/x-pack/plugins/transform/public/app/hooks/use_index_data.ts
index fe56537450c2b..2dabc6ba1595d 100644
--- a/x-pack/plugins/transform/public/app/hooks/use_index_data.ts
+++ b/x-pack/plugins/transform/public/app/hooks/use_index_data.ts
@@ -87,9 +87,9 @@ export const useIndexData = (
     // Get all field names for each returned doc and flatten it
     // to a list of unique field names used across all docs.
     const allKibanaIndexPatternFields = getFieldsFromKibanaIndexPattern(indexPattern);
-    const populatedFields = [...new Set(docs.map(Object.keys).flat(1))].filter((d) =>
-      allKibanaIndexPatternFields.includes(d)
-    );
+    const populatedFields = [...new Set(docs.map(Object.keys).flat(1))]
+      .filter((d) => allKibanaIndexPatternFields.includes(d))
+      .sort();
 
     setCcsWarning(isCrossClusterSearch && isMissingFields);
     setStatus(INDEX_STATUS.LOADED);