Using the mythril bow with infinity and quickdraw 4(unsure if this is a factor) you can shoot arrows from Spartan Weaponry and duplicate them endlessly.

To Reproduce
Steps to reproduce the behavior:
Mythril bow w/ infinity + quickdraw 4
Shoot arrow at a wall or something
Pick up arrows and do it again

Expected behavior
For the arrow count to stay the same / for the one arrow to stay in my inventory because I have infinity

Info (please complete the following information):

• Modpack Version: 2.77.5
• Server or Singleplayer: Server
• Version the world was created on: 2.77.5

Additional context
It's either a server side issue or the arrows responding negatively with the mod imo

Fixed next patch