Can you provide a specific example from the text of someone suffering consequences for disobeying Baba's instructions about travel and food?

Certainly. Chapter 9 recounts an experience of the biography's author. After visiting Sai Baba, he was explicitly told, "Eat a piece of bread and leave after noon." Ignoring this command, the author hurried to the station in a bullock cart. As a direct consequence of his disobedience, the cart's wheel came off and fell into a ditch. This caused a significant delay, making him miss his train. He was ultimately forced to stay and eat at an eatery in Kopargaon before catching a different train, thus enduring the fate of his own stubbornness.