"Debunked"? I think not.
Dionysus was the god of fertility and vegetation, so of course resurrection was part of his mythos. He also returned from the underworld.
"Hera was jealous of the child and convinced the Titans to destroy him. Although Dionysus was disguised as a baby goat, the Titans found him, caught him, and tore him to pieces. They ate all of his body except his heart, which was rescued by Athena . She gave the heart to Zeus, who gave it to Semele to eat. Semele later gave birth to Dionysus again. The story represents the earth (Demeter) and sky (Zeus) giving birth to the crops (Dionysus), which die each winter and are reborn again in the spring."
https://www.encyclopedia.com/philosophy-and-religion/ancient-religions/ancient-religion/dionysus
See Euripides' The Bacchae (405 BCE): "but forthwith Zeus, the son of Cronos, found for him another womb wherein to rest, for he hid him in his thigh and fastened it with golden pins to conceal him from Hera. And when the Fates had fully formed the horned god, he brought him forth and crowned him with a coronal of snakes..."
