endgame maps

I am really angry about the errors in the final maps. The first time I got disconnected, I found out that I lost the Nexus map and the waystone to it. I haven't found the Nexus since then. Today, I wanted to do another map after the Tower, which had a path assigned to it. It turned out that this was an error, and a different one was available. When I started playing it, I got disconnected, and when I returned to the game, I found that I had lost the waystone, the map, and the loot I had in my inventory. However, the path to this map appeared correctly. I opened it again, and after exiting to the hideout, I found that I couldn’t return because the portals disappeared..