Tipped arrows fire as normal arrows when held in off hand

When firing tipped arrows held in off hand bow fires normal arrows. If the arrows are placed in inventory they fire as tipped arrows with effect.

Bow is enchanted with:

Power IV, Infinity, Fire, Punch II, and Unbreaking III

Also, tipped arrow in off hand is not consumed, at first I thought it was a bug that was allowing infinite tipped arrows, but I fired at wall and noticed there was no effect particles from bow.