I believe that this is only happening in some worlds. One of my worlds has this issue. In Minecraft 1 block in the nether is 8 blocks in the overworld. In my world 1 block in the nether is 6 blocks in the overworld. This affects my gameplay because it is a little confusing connecting the nether portal.  You can see the problem here. https://youtu.be/PrPQJhkOBJ4  

I made my world in Jan. 2019. The problem was there when I made the world.