Not necessarily.

Revatinandana: In Calcutta, Prabhupada once said that when a pure devotee leaves his body he takes another birth on the planet where Krishna is appearing. Then, when Krishna leaves that planet, the devotee goes with Him back to the spiritual sky for good. So there is one more birth after one becomes a pure devotee, but it's not a material birth, because it is a birth with Krishna where He is appearing and having His pastimes, and after that one goes to Goloka with Him.

Another time in his room in Calcutta I asked him, "Because you are a devotee of Radha and Krishna, does that mean all of us are inherently devotees of Radha and Krishna?" He said, "Not necessarily." I said, "So we might be devotees of say, Lakshmi-Narayan or Sita-Rama?" He said, "Yes." I said, "Am I to understand that by doing this process our relationship with Krishna, in whatever form, will be uncovered?" He said, "Yes," again.

Ultimately not every devotee would become attached to Radha and Krishna. I was thinking of the story of Murari Gupta in the Chaitanya Charitamrita, to whom Lord Chaitanya said, "You are a pure devotee of Lord Ramachandra. You are Hanuman." In other words, there are some devotees who are constitutionally attached to other forms of the Lord. But Radha and Krishna contain all the other forms within Them, and by purification, we would find our ultimate relationship. At least that's what he told me in Calcutta.