Question:
When a guest is served food, then decides not to eat anymore, goes to his room, and then is (totally unexpectedly) brought a new food (same bracha as before), does he make a new bracha, since the new food was totally unexpected and the earlier eating session was terminated when he retired to his room?
Answer:
If you left the room with the intention to end the meal, then that would be considered a hefsek in the meal, and a new bracha would have to be said.
Best wishes
Sources:
O:CH 179-2, M:B 179-10, Piskei Tesu=huvos 179 ftnt. 49.