This is by far the worst. I have LP set up with a shortcut + fingerprint tap on my MBP, which works great until I'm generating a password, which never gets saved. I have to remember to get my vault page open ready to fill in before I generate the password, because if I generate one from the toolbar dropdown I'll never see it again. Ugh.
The worse thing that happens to me is if I generate a password, and then Lastpass doesn't save it! It feels like a 50% shot it will actually save the generated password.
I have nearly 1000 passwords stored in it now, so it's going to be a huge pain to migrate.