lemmy.world did update today and I was able to finally login to Liftoff. It did take about 5-10 minutes to fully login and load content though.

Yes, I'm able to log into the same lemmy.world account with both Jerboa and Thunder. I also have a beehaw account, and like V4uban, I am able to log into it using Liftoff.

I've lowered my password to 15 characters and even removed special characters but it still just spins when connecting to lemmy.world

I've been trying to do the same today. I think it's more likely that your instance is blocking access to kbin altogether or specific magazines. For example, I have both a beehaw.org and lemmy.world account. I can access https://beehaw.org/c/kbinmeta@kbin.social and can subscribe from that page but https://lemmy.world/c/kbinmeta@kbin.social returns a 404: couldnt_find_community error.

The reason I think it might be instance specific versus, say a bug in the server version, is because https://lemmy.ml/c/kbinmeta@kbin.social and https://beehaw.org/c/nsfw@kbin.social both work and but https://lemmy.ml/c/nsfw@kbin.social doesn't work. Presumably lemmy.ml is blocking the nsfw magazine.