Signal doesn't share your contact list. WhatsApp does, and this will not get "fixed", because it is done on purpose. It's the reason why Facebook paid $19 billion or so to buy WhatsApp, and from what I understand it's the main reason why Facebook/Meta keeps maintaining and developing the app.
That contact list is a huge deal if you consider how, connected to other data leaked by people using Facebook, Facebook Messenger, Instagram or other Facebook properties, it lets Meta know so much about you. For example, do some of your contacts use Messenger with location information? Do they often travel to the same location, which is a school? You likely have kid(s) in the same school as they do. It's scary if you consider the implications.
That contact list is a huge deal if you consider how, connected to other data leaked by people using Facebook, Facebook Messenger, Instagram or other Facebook properties, it lets Meta know so much about you. For example, do some of your contacts use Messenger with location information? Do they often travel to the same location, which is a school? You likely have kid(s) in the same school as they do. It's scary if you consider the implications.