https://media.discordapp.net/attachments/999426920376717513/...
Generated with Midjourney Beta
As far as I could tell (using it before, during, and after this Beta option was available) it was the upscalar using that, not the original 4 image generation.
https://media.discordapp.net/attachments/999426920376717513/...
Generated with Midjourney Beta