Signal Desktop has never worked that way.
After the initial linking process, Signal Desktop has always functioned independently of your phone being on.
Re:Signal Foundation
by jakebasile on Thursday February 22, 2018 @01:54AM
(#16435734)
I must be misremembering it. I'd edit my comment but it's timed out.
I still hope they use some of this cash to make a real iPad and Desktop app, though. I'd really love to use the service but those are deal breakers for me.