Google recently deployed another stealthy change that will have a mixed impact on the performance of countless ecommerce merchants. Your shopping ads are going to start showing on YouTube and Discover (an Android app), even if you didn't select that option.
Now, I love Google. But I do wish they would be a bit more transparent when they opt all of their customers in to new features that cost them money. This change hasn't been very well communicated, other than some hyped-up announcements back in May about new features coming soon.