Most of the PC2.0 apps don't support lnaddress yet. If you have a wallet that supports keysend, which Alby does, you should choose keysend (or node) so you can get all of the metadata that keysend allows us to attach.

You can use lnaddress, but a lot of the apps will fail with their payments until they get around to supporting lnaddress.

I've changed SF back to default to using keysend, since you're not the first one to be confused by the changes.