We are still developing more in-game features, such as further uses for Follower Crystals! Currently, this is not a bug though.
The Follower update has been removed from 1.2 in our updated Roadmap as part of our June Community update, just in case it was missed
As mentioned above, the Follower update will be coming with an update later in the year. Once the roadmap is updated again, we will share it in another Community Blog!