Yup. So beehaw is a pretty closed site with strict moderation. They're trying to keep a particular tone and style for users and content (think safe space). Lemmy, in contrast, is open for sign-ups, and just had a ton of ex-redditors coming in with a very different culture, tone, way of interacting, etc. Since there's so many Lemmy users now, beehaws moderators couldn't keep up (there's only four of them apparently), so they defederated.