add client to the mutation result

packages/hooks/src/data/MutationData.ts

@@ -42,6 +42,8 @@ export class MutationData<
   public execute(result: MutationResult<TData>) {
     this.isMounted = true;
     this.verifyDocumentType(this.getOptions().mutation, DocumentType.Mutation);
+
+    result.client = this.client || this.refreshClient().client;
     return [this.runMutation, result] as MutationTuple<TData, TVariables>;
   }