Nether portal not being reused for return in 1.11.1

This was fixed some time ago.
When you return from the nether it should use the one and only gate you created to go to the nether. Instead, a gate is created a distance away in the real world. That gate is used for subsequent returns unless it is destroyed, in which case another portal is created, In my case, that was in a cave roughly 30 blocks below the second gate.