In some cases costs appearing in Planner were not displaying in the Itinerary. This issue was occurring when all services were the same for multiple days, which results in them being combined in the itinerary, followed by one day with different services, and then again multiple days with the same services which are then combined. In this case, the day in the middle was not appearing.
Example:
Day 1 -3 : Something that is the same on multiple days
Day 4: Something different
Day 5-6: Again something that is the same on multiple days
In this case, the itinerary output would not show Day 4.
This issue has been fixed.