when i had a 1.8 server me and my friend made a nether portal which worked back and forth. now on 1.9 snapshot 15w41b if you go in the nether portal from the overworld it brings you to a location about 100 blocks from the portal in the nether, and if you go through that you end up falling in a lake, once again about 100 blocks from the portal in the overworld. i copied the world and tried it on normal minecraft and the portals worked fine. i don't know what happened to make it do this, just please fix it. i got the server from mojang.com.