Nostalrius Begins - Quality wow vanilla realm (1.12)

I completed the quest A Terrible Purpose (#8287) and received the follow up in-game mail from Commander Mar'alith. Unfortunately, the mail does not include the expected reward item: Nature's Whisper (#20645).

http://www.wowhead.com/quest=8287/a-terrible-purpose

http://www.wowhead.com/item=20645/natures-whisper

I've already filed a bug report, but thought I'd post here in case anyone else was searching for the same problem.

https://report.nostalrius.org/plugins/tracker/?aid=1461

This issue hasn't been addressed. I also had the same issue happen to me today.