End gateways generation problem

[Coryy82]

• Version: betterendforge-1.16.5-2.5
• Problem: I defeated the end dragon and went through my end gateway only to find I spawned on top of a tree in the blossoming spires biome and there is no return end gateway, I tried summoning one with /setblock but it just generates a new gateway ~10 blocks away and teleports me there
• Recreate:
  1. Kill End Dragon
  2. Enter Through Gateway
  3. See there's no gateway to return home :(