The main issue I'm having with liftoff is that I cannot upvote or comment posts from other instances with my lemmy.ml account, so I'm still using jerboa
It is kinda bad UI decision, not a bug. You should login into your account on some instance and choose through which instance you get content on the top of the screen. After that you will not have problems with commenting. Same thing with search, under search rectangle choose your instance! β€οΈ
I can upvote and comment on posts from any instance.
I mean you can if you have multiple subscription or if you do it through your main instance, but that's a feature all clients have and I think they do it in a more intuitive way, conpared to LiftOff