diff --git a/client/coral-admin/src/containers/UserDetail.js b/client/coral-admin/src/containers/UserDetail.js
index 3a458ff83..702ca4d81 100644
--- a/client/coral-admin/src/containers/UserDetail.js
+++ b/client/coral-admin/src/containers/UserDetail.js
@@ -19,7 +19,7 @@ import update from 'immutability-helper';
 import {notify} from 'coral-framework/actions/notification';
 
 const commentConnectionFragment = gql`
-  fragment CoralAdmin_Moderation_CommentConnection on CommentConnection {
+  fragment CoralAdmin_UserDetail_CommentConnection on CommentConnection {
     nodes {
       ...${getDefinitionName(UserDetailComment.fragments.comment)}
     }
@@ -155,7 +155,7 @@ export const withUserDetailQuery = withQuery(gql`
       author_id: $author_id,
       statuses: $statuses
     }) {
-      ...CoralAdmin_Moderation_CommentConnection
+      ...CoralAdmin_UserDetail_CommentConnection
     }
     ...${getDefinitionName(UserDetailComment.fragments.root)}
     ${getSlotFragmentSpreads(slots, 'root')}
diff --git a/client/coral-framework/graphql/reduceDocument.js b/client/coral-framework/graphql/reduceDocument.js
index 3e0118eba..fb47daaff 100644
--- a/client/coral-framework/graphql/reduceDocument.js
+++ b/client/coral-framework/graphql/reduceDocument.js
@@ -63,12 +63,32 @@ export function mergeSelectionSets(a, b) {
   };
 }
 
+function getFragment(name, execContext) {
+  const {
+    rawFragmentMap,
+    fragmentMap,
+  } = execContext;
+
+  if (!(name in fragmentMap)) {
+    const fragment = rawFragmentMap[name];
+
+    if (!fragment) {
+      throw new Error(`fragment ${fragment.name.value} does not exist`);
+    }
+
+    const typeCondition = fragment.typeCondition.name.value;
+    const transformed = transformDefinition(fragment, execContext, `type.${typeCondition}`, typeCondition);
+    fragmentMap[name] = transformed;
+  }
+
+  return fragmentMap[name];
+}
+
 /**
  * Return selections with resolved named fragments and directives.
  */
 function getTransformedSelections(definition, path, gqlType, execContext) {
   const {
-    fragmentMap,
     variables,
   } = execContext;
 
@@ -92,7 +112,7 @@ function getTransformedSelections(definition, path, gqlType, execContext) {
       return o;
     }
 
-    const fragment = fragmentMap[sel.name.value];
+    const fragment = getFragment(sel.name.value, execContext);
 
     if (!fragment) {
       throw new Error(`fragment ${fragment.name.value} does not exist`);
@@ -105,20 +125,19 @@ function getTransformedSelections(definition, path, gqlType, execContext) {
         ...fragment,
         kind: 'InlineFragment',
       };
-      const transformed = transformDefinition(node, execContext, path, typeCondition);
       const name = getDefinitionName(node);
 
       // Merge existing value.
       if (name in o) {
-        o[name] = mergeDefinitions(o[name], transformed);
+        o[name] = mergeDefinitions(o[name], node);
         return o;
       }
 
-      o[name] = transformed;
+      o[name] = node;
       return o;
     }
 
-    const fragmentSelections = getTransformedSelections(fragment, path, typeCondition, execContext);
+    const fragmentSelections = fragment.selectionSet.selections;
     fragmentSelections.forEach((s) => {
 
       if (variables && !shouldInclude(s, variables)) {
@@ -184,7 +203,8 @@ export default function reduceDocument(document, options = {}) {
     : `type.${mainDefinition.typeCondition.name.value}`;
 
   const execContext = {
-    fragmentMap: createFragmentMap(fragments),
+    rawFragmentMap: createFragmentMap(fragments),
+    fragmentMap: options.fragmentMap || {},
     keepFragments: [],
     variables: options.variables,
     typeGetter: options.typeGetter || (() => null),
diff --git a/client/coral-framework/services/graphql.js b/client/coral-framework/services/graphql.js
index 42e9cd8ad..87b8e220a 100644
--- a/client/coral-framework/services/graphql.js
+++ b/client/coral-framework/services/graphql.js
@@ -9,13 +9,17 @@ import {addTypenameToDocument} from 'apollo-client/queries/queryTransform';
 export function createGraphQLService(registry, introspectionData) {
   const typeGetter = createTypeGetter(introspectionData);
 
+  // Use shared fragment map.
+  // Attention: Fragment names must be unique otherwise weird things will happen.
+  const fragmentMap = {};
+
   return {
     registry,
     resolveDocument(documentOrCallback, props, context) {
       let document = typeof documentOrCallback === 'function'
         ? documentOrCallback(props, context)
         : documentOrCallback;
-      document = reduceDocument(registry.resolveFragments(document), {typeGetter});
+      document = reduceDocument(registry.resolveFragments(document), {typeGetter, fragmentMap});
 
       // We also add typenames to the document which apollo would usually do,
       // but we also use the network interface in subscriptions directly