Stability AI lawyers never contacted HuggingFace requesting an IP takedown. You may ask HuggingFace themselves.
RunwayML agreed not to release 1.5 for safety reasons in writing and then chose to anyone presumably leading to confusion by our tech team who let HF know it couldn't be them.
You can ask them why they did that, Runway being a private company https://www.forbes.com/sites/kenrickcai/2022/12/05/runway-ml...
Three of the 5 authors of latent diffusion including the two lead authors are at Stability AI.
On the Discord it was Discord themselves that did it to the puzzlement of Kaarsetun and I, we are good with each other.
On the Subreddit that was our fault completely, for which I did a public apology around the issues with Automatic1111.