[MCPE-189106] Upon loading dimension, Nether Portal offsets player towards NW

When the dimension first loads, the player is offset towards the north-west, ~~which sometimes causes the player to noclip through blocks as in~~

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. (you no-longer fall though the floor as of v1.21.70)

Steps to Reproduce

Make a 3×3 Nether Portal in the Overworld, along the X axis.
Link this portal to another 3×3 Nether Portal in the Nether (also along the X axis).
Enter portal. Rather than perfectly within the frame, the player is offset towards the North (-Z).
When repeated for portals along the Z axis, player is offset towards the West (-X).

I’ve recreated the setup here:

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Expected result
Player ends up within the portal frame upon loading the dimension.

Observed result
Player offset towards N/W.

Related issues

relates to

MCPE-157992 Minecarts come out of nether portals offset to the NW and may displace or kill mobs that come through portals after them

Attachments

B) clip into wall & fall (compressed_rec).mp4

MCPE-189106_Test.mcworld

Comments

migrated 2024-12-12T14:09:39Z

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X1Crafts 2024-12-12T18:10:04Z

Possibly related to MCPE-180268?

NpBlaster36 2024-12-12T20:38:16Z

I think it has more to do with MCPE-157992 rather than MCPE-180268.

[MCQA] v-jakublu 2025-03-06T14:16:22Z

Hello and thank you for your report!

Could you explain what is the exact steps for the bug to do the "noclip" part, where you fall of the world?
Also we would appreciate further explanation of the offset part of the issue - how the things were looking "before" the bug?

Also the video with more specifics would be helpful.

NpBlaster36 2025-04-23T15:06:27Z

So the noclip part just happened whenever it wanted to. I couldn't isolate when it happened but I did figure out it only occurred during prolonged in-game sessions in combination with the offset. As of 1.21.70 however, I haven't noclipped through the floor so something may have changed in this release and in turn stopped this from happening.

In summary, the nocipping part of the bug has been fixed while the offset part has not.

In context with how the offset should be, on java edition, when a player completes loading through a nether portal, they would emerge from the portal centred onto the portal frame. On bedrock edition however, the player is slightly offset to the North/West (dependent on the orientation of the portal frame) by 0.5 of a block... i.e. you're sticking out of the portal frame by half a block instead of being fully within the portal frame. I've put together a diagram to help visualise what's going on.

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NpBlaster36 2025-04-23T15:34:34Z

If blocks were placed on the sides where the player would get offset, the player physics would push them back into the portal fame. Although, if you had a lavafall on those sides, since you’re sticking out of the frame, its essentially an instant-death scenario unless you have fire resistance or good enough gear.

[MCQA] v-jakublu 2025-04-25T14:19:14Z

Thanks for your spacious explanation. Bug is now being investigated.