Why did Baba interrupt Madhavrao's worship to insist that he go and finish reading the Bhagavat?

There seems to be a confusion of both the person and the action in this question based on the text. According to Chapter 18, Baba did not interrupt Madhavrao's worship; in fact, it states Madhavrao's worship was already over when he emerged with a message from Baba. The person who was interrupted while reading the Bhagavat was the narrator of the story. As Chapter 18 details, the narrator had put his book aside halfway through a story to go listen to Baba in the Masjid. It was this narrator whom Baba, sensing the unfinished reading, insisted should return and complete the remaining part, showing the immense value Baba placed on finishing the sacred Parayana.