GF 2.9 Automatically adds 3 new thumbnail sizes to every image uploaded

[chrishajer (Chris (Gravity Forms))]

This issue has been reported to the product team and will be fixed in a future release.

See previous report:

BUG: GF adds extra images when active

I was setting up a new blueprint site when I noticed that three extra files where being generated for every image I uploaded. The sizes are 300x300, 400x400, 600x600. I was able to confirm it was GF by disabling and re-enabling. I have no created forms yet. I looked through the settings and I do not see anything that indicates this would happen. How can I stop it?