It is very rare to get a pic were the ponies, as a group, are this perfect from raw gen. I have around 200 other pics to proof that. This, after nearly playing with AI for 2 years, is like a win in the lottery.
The apples weren't even in the prompt, "pony pile" was. But Invoke has this cache function and stores some of what I generated previously to ease the use on the GPU. Since I tried to get Applejack on her "apple orchard", I think it came from there. Anyway, near perfect group pic right out of the generator, I take that win.