It’s hard to say for sure… but I might lean towards a too stiff arrow. One sure sign of a too stiff arrow is to hear a “click” as the arrow passes the shelf and the back of it bangs against the shelf. Even if you don’t hear this, it could be just a bit too stiff, causing the hen feather to rub on the shelf.
If you use a heavier point on your arrow by say, at least 50 grains, you may see the feather wear go away… And your arrow flight improve a bit.