It’s old news that the seeds from hybrid plants don’t produce hybrid plants, but throwbacks to the plant varieties used to hybridize them. This sounds like pretty much the same thing.
My wife did just that. She had a tomato in the store she liked and replanted the seeds. The first year the plant only grew tomatoes on one side. After several generations, it reverted back to a very nice and tasty tomato but it had a woody core where the stem attached.
It has to do with isolation on an island and the random nature of sexual reproduction. Giantism and dwarfism among animal species results from the same thing. But thanks for playing.