Open 1.7.0: 1.11.1: Botania crystal bow does not work without arrow in inventory

Version:
1.7.0

What is the bug:
The crystal bow from Botania is not supposed to require arrows. It should only require a source of mana, such as a charged mana tablet in the user's inventory.

In 1.11.1 the crystal bow will not fire unless there is at least one arrow in the user's inventory.

According to this bug report, the problem may be due to an interaction with EnderCore: https://github.com/SleepyTrousers/EnderCore/issues/1

Mod & Version:
Botania r1.7-221, EnderCore 0.1.0.24_beta

Paste.feed-the-beast.com log:


Can it be repeated:

1. obtain crystal bow, place in hotbar
   
2. obtain charged mana tablet, place in inventory
3. attempt to fire bow with right-click

Known Fix:
A workaround is to keep an arrow in one's inventory when using the crystal bow.