I am playing on a bedrock realm with 1 other person. We killed the ender dragon yesterday, which went well and we thought created an end gateway as one of us has seen it...

We then both went through the portal back to the overworld which then played the end credits. When we were both watching the end credits halfway through this kicked us both out of the server (kicked us out - we are guessing due to inactivity). When we spawned back in, we were both inside the end where we killed the dragon. Hence, we retried going through to the portal to the overworld and watching the end credits again. Once again, we got kicked off the server about halfway through and when we got back onto the server we spawned again where we killed the dragon. The final time, only one us went through the portal at a time to see the end credits and this did not kick us off the server. But we found an issue when we got back to the end to go hunt for end cities - We could not find the end gateway to the end cities. We have had to block our way to the end cities which has been very dangerous.