Stuck on Building Terrain when use Nether Portal

When I enter a portal in the process it never takes me to the nether or overworld and the game stays like this on pause and when I exit the game and re-enter it sends me the same coordinates if I am in the overworld 1000 150 1000 it takes me to those coordinates to the nether and the world is damaged by the unexpected closing of the game when passing the portals.