Portals are not working as intended. Whenever you go through portals, if there are no portals in the intended area, it creates one roughly near the intended are. But for me the intended are was well away from my actual portal, but that's besides the point.
Also sometimes when you come out a portal while someone is watching you on the other end, they can't see you but that's for another ticket.
Here are a few screenshots.
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.