I’m hoping this is a bug, but would love for Blizz to confirm against the reference client.
I took Goblin engineering first and did the Goblin membership renewal (Gadgetzan) until I got my Pet Bombling recipe, yey!
I then unlearned engineering, leveled it again, and used the book in Tanaris to switch to Gnomish engineering.
I went to Booty Bay to begin the Gnomish membership renewal to hunt for the Lil’ Smoky recipe, but the renewal quest was not there, nor the pre renewal quest.
I went back to Gadgetzan and confirmed I can still do the renewal quest for Goblin, even though I’m now a Gnome specialization!
Please confirm if this is intended or a bug. I’d love to know if the membership quest is intended to reset when the book is used to swap specializations.
Edit for future readers: Yes you can switch specialization and get the pet recipe from both renewals! You will have to wait out the 14 day renewal period to get the quest of the other specialization you switch to though.