Small bug with an easy fix.
To create regular Fletched Field Point Arrows (FFPA) it takes the regular shaft, rocks for the point and fletching.
But for the Fletched Heavy Field Point Arrows (FHFPA) it just takes heavy shafts, and fletching.
We need to add a recipe for Heavy Field Point Arrows (non-fletched) so that FHFPA do have rocks for their heads, and not just air.
And also an edit to the FHFPA to make sure that they take only Heavy Field Point Arrows and not Heavy Shafts.