It was because of me :(. I just wanted to inform the dev that Raccoon Markdown renderer don't support support some Markdown. He thought I was complaining so much. Then, Boom he deleted his account and Repo.

The "previously on ..." for this drama was that someone created a Fediverse post ranking the different apps for how well they handled Lemmy's Markdown, and Racoon didn't score well in the original post. It was later revised after further testing, but the damage was already done.