A new bug/glitch just showed up in my restaurant today with the Goal Collectibles.
The Goal Collectibles are still dropping but I'm also getting Collectibles that aren't related to any goal active: a Red Lantern, Green Scarf, an Ice Skate and a Pinecone with a bow on top:
When one of these non-goal Collectibles drop, the counter pops up in the bottom left corner as though they're being tallied but they're not actually adding to my Collectible totals. This could be an issue for those players hoping to build more appliances to finish the goal.
I'm assuming these are the Collectibles we'll be gathering for the next 15 Day Goal but their early appearance is messing with the current Collectibles drop rate. I'm still getting roughly the same amount of Collectibles per recipe but as most of them are the new items, the goal collectibles are dropping with far less frequency.