Full disclosure: I discovered a bug in FediThready. I'm guessing there's something I didn't account for in the updated Regexp that finds split points. Might be related to all-caps words, but I'm not sure. I'll look into it Monday if i remember, but if you're an interested JS geek looking for a small Open Source task to help with... I'm happy to have external contributions https://github.com/masukomi/fedithready/issues/3