She and her only surviving son, Yixin, were not satisfied with this arrangement. According to imperial customs, Imperial Noble Consort Dowager Kangci had no right to claim the position of empress dowager because she was neither the birth mother of the Xianfeng Emperor, nor did she hold the rank of Empress while the Daoguang Emperor was still living.
She and her son Yixin were unhappy with the proposed arrangement.  Imperial customs prohibited Imperial Noble Consort Dowager Kangci from becoming empress dowager because she wasn't the biological mother of the Xianfeng Emperor, nor had she held the position of Empress while the Daoguang Emperor was alive.