After looking around the net, it seems a number of people have had this issue. After igniting the leak in vault 22, 5th floor pest control, you lose physical contact with Ed-e, but everyone in the game still sees him, and he is still considered your companion. Has anyone found a way to retrieve him? You cant wait for him, or find him using the vault 22 elevator. Thnx

I had this problem with ED -E but somewhere else .. with the followers of the apocolypse, he just disapeard. but then after a while he decided to go back to prim. so i manged to get him again. he also seems to get stuck in the lucy 38 for some reason.

Lost him in vault 11