Permanence of moksha in Hinduism?

I have a big problem that's been bothering me. In moksha, we achieve union with Brahman in God's loving presence. My question is, when the universe is dissapated and destroyed at the end of Brahma's life, and then is re-created, what happens to the jivas that have achieved moksha? Obviously they are secure in Brahman but are they re-released from sat-chit-ananda to live again as reincarnated beings, back at the starting line? This is especially something to think about if the gods too are destroyed at the end of Brahma's life. Or is moksha absolutely permanent - as the universe is created and destroyed, liberated jivas remain liberated?