What is the authenticity of the narration regarding Ali (may Allah be pleased with him) dozing off before the ‘Isha prayer, as reported in Musannaf Ibn Abi Shaybah, and does the authentication of Abdullah ibn Abdullah Al-Razi's grandmother affect its authenticity?

We have not found anyone who transmitted the aforementioned narration other than Ibn Abi Shaybah in his Musannaf. Abdullah ibn Abdullah al-Razi is trustworthy. We have not found the name of his grandmother or anyone who spoke about her. If she is Umm Musa, the concubine of Ali (may Allah be pleased with him), then more than one scholar has authenticated her.