The description of bug is basically the title. I practiced on a training dummy, so I'm not sure if it gives whoever gets hit a message/damage. Repeated once or twice. This did consume the arrows and apply attack cooldown however, despite leaving no message.

Step 1, Shoot something with a bow and arrow (may apply to flinging as well)

Step 2, Arrow consumed, no message given and attack cooldown is applied to the character.

Additional info: All arrows are also considered broken. I have not crafted new arrows since the hiatus. I've made a seperate bug report for that.