Can you explain the specific problem Das Ganu faced while translating the Ishavasya Upanishad and how Sai Baba addressed it?

Das Ganu undertook the task of creating a commentary on the Ishavasya Upanishad in simple Prakrit language, as detailed in chapter 20. Although he managed a word-for-word translation, he felt no joy because he could not comprehend its "internal secret." A particular doubt arose that even learned scholars could not resolve to his satisfaction. When he went to Shirdi, he took his doubt to Sai Baba. Instead of explaining it directly, Baba cryptically told him, "The resolution of this doubt of yours will be done by the maidservant at Kaka’s house When you return there." This illustrates how a Guru can provide solutions in unexpected ways, demonstrating that grace, not just direct teaching, is key to resolving deep spiritual quandaries.