It is not due to path choice. If you go in Olivia path, you will get stuck in 0.9 game content with Max being locked at home with just one girlfriend. If you select "fight for Alex", you turn off morning yoga requirement. If you go in "forget Alex" path, you have to do yoga twice a week.
I've already said that you problem is caused by you not convincing Lisa to
during homework before starting training with Kira. Or maybe lock started when Ann switched to new punishment mode and Lisa was not yet convinced.
If you don't want to give Lisa to Alex or Eric, you should select any non-Olivia path and start the war with Eric the moment he tries to take over Lisa's training and you should not delay triggering Lisa's training until you kick Eric out as that did not go well in Big Brother 0.4 version.
Without your save I would be guessing state of all your flags and I would have to tell how to create custom cheat menu to modify poss.sg flag without checking if my advise works. If I am reading binary logic correctly, it is possible to get dialog for changing Lisa's mind, if she gets punished by Ann for mistakes in homework. But it is possible that game allows flipping Lisa's mind only in simple punishment variant and not in new naked punishment.