Nether teleportation not loading

As right now they nether is not fully working half of the time. Many times I have gotten into the nether portal to enter the nether portal for some of the area not to be loading, allowing me to see through block. I have waited for the are to load but it does not and I am forced to save and quit. After I have done that, I start up the world again for it to have teleported me quite a distance from my nether base.