Since updating the end will not render correctly. I can get to the main island, but when I got through a portal I will appear inside the portal on the other side and die. Or it will spawn me over nothing ness. When inside the portal I can right click and whatever block I'm clicking will simply disappear. Not be destroyed just cease to exist. Sometimes it will put me through normally but will only show 20-40 blocks around me and show nothing else. This is very frustrating as this is an old world for almost a year of work behind it. We recently used realms too and had this same problem while in realms or playing locally.