Take a look at the legal doctrine of collateral estoppel. Once a party gets its day in court on a specific issue of fact, it can't keep relitigating that issue in later legal actions. It's possible that Cloudflare was the first to take Sable's claims all the way to a verdict (versus settling early), so Sable might have finally gotten its day in court.

https://en.wikipedia.org/wiki/Collateral_estoppel