Sigh-Fi

Not only is it the same Sarlacc (the Almighty Sarlacc), the reason it was so bad at eating Lando is because the Almighty Sarlacc was a vegetarian and really didn't want to eat Lando.

Although most sarlaccs ate flesh, this one preferred vegetation, and especially did not want to eat sentient beings. Despite attempting to communicate this to visitors in the Sarlacc language, they did not understand and regularly pushed each other into the Almighty Sarlacc's mouth. Unable to spit them out, it would store them within its ninth stomach.

It told C-3PO about its life and experiences, and asked that it stop being force-fed living beings. When it discovered that C-3PO was in the service of Luke Skywalker, it attempted to convince him that serving others was not his higher purpose. C-3PO explained that he was created to serve, and that he needed to assist in a great struggle. After C-3PO was gone, the sarlacc was left with only the company of Boba Fett, but was glad when he escaped.

One of my absolute favorite pieces of plothole-plastering, in such a short story it manages to re-contextualize the Sarlacc into a really rich and tragic character.