Possibility of fall down in Vaikuntha

After all, the living entity falls down from the spiritual world. Just like
Jaya-Vijaya. There is possibility, if you do not stick to the spiritual
principle, even if you are in Vaikuntha, you will fall down, what to speak
of this material world. Because in the Vaikuntha or in the spiritual world,
no contaminated soul can stay there. He will fall down.
Now, when the spirit soul falls down? Just like Jaya-Vijaya. Jaya and Vijaya
became asuras. They fell down from Vaikuntha.
>>> Ref. VedaBase => Bhagavad-gita 17.1-3 — Honolulu, July 4, 1974