Before 15w41b, the nether portal in the overworld would normally target you to the nearest nether portal in the nether. But recently in this snapshot, that is not working.

If you have a world that was made before 15w41b and visited the nether, it would normally teleport you to the portal in the Nether.

But when I used my Nether portal in the overworld, instead of teleporting me to the portal in the nether, it puts me in the wrong place (without a portal) in my case, I teleported above a lava lake. I was forced to switch to creative to looked at the surroundings. I found out that I wasn't actually far from the portal I should've been teleported to (About 300 blocks away).

I tried again after and it still teleports me to the lava lake. In my opinion, this is a bug and will give people who play in survival a worry.

I would like to put attachments, but it won't let me.