My first experience in the nether was more of a nightmare than it should have been! Luckily, my experienced daughter came in to rescue me via teleportation.

I went into the nether, did very little and attempted to come back to my original and only portal which was inside a building against a stone wall. But, I was faced with snow, trees and basically ended up in another location outside. It turns out that my world is playable because this AI-generated portal is about 100 or so blocks at a guess from the portal I'd built. Still, this is clearly a bug and my daughter, who also plays Bedrock on a laptop, is puzzled by this and has never experienced this herself.

I did some fault-finding: Thought it may have been my texture pack causing the issue (shouldn't be possible) but I copied the world and reverted to default textures... same problem.

I searched for this issue and many portal ones came up, but most were Java issues and most said Resolved. I apologise if this is a duplicate issue and I hope you can explain why I have suffered this issue but others on Bedrock PC may be trouble-free. Thanks in advance.

Edit 1: I tested today by trying to replicate as much as possible my world as another world... hard level, Medieval Texture Pack, snowy village biome, all other settings / cheats as default, and this portal worked ok... I returned from the nether to my original portal. The issue lies, at least, with my current world. I have been playing in this world for weeks... since the day the 1.18.2 update was released, but this was my first (ever) venture into the Nether. (Just for information)

Edit 2: Am I onto something here? I didn't know that when entering a nether portal into the nether (nether noob), then going round or through to the other side of the nether portal, then coming back into the overworld from the OTHER SIDE of the nether portal, that it then returns you the other side of the overworld portal... or tries to! However, if the portal is built against a stone wall (as just tested in my test world), it 'obviously' can't pass you through the solid wall in the overworld... I just linger obstructed in the portal unless I turn 180, walk through the other way and return the original side of the overworld portal. But, in the world in which this issue happened, my first portal WAS against a stone wall with solid mountain behind it... and it nevertheless (presumably) somehow passed me through and transported me to an area about 100 - 200 blocks to the left-rear of my facing direction through the portal.

[I feel that Nether portals should always return you to the same side of the overworld portal... regardless of the direction of entry from the Nether, but it's not my game.]