[MC-278668] The direction of entities in the End is different from that in the Overworld

Before game version 1.21.1, the direction of entities entering the End retained their movement orientation (momentum) along the direction of the Overworld, as shown in the image. In version 1.21.1, concrete powder entering the End portal from the Overworld along the south and north directions would still retain its orientation in the End, maintaining the south and north direction. However, in the 1.21.4 version, in the same save, concrete powder entering the End portal along the south and north directions in the Overworld can be changed to face the west and east directions in the End. This bug has affected the use of my redstone machines. I discovered this bug in version 1.21.3, but it has not been fixed in the new version. The website has a file size limit, so I am unable to upload the video.

I have submitted the relevant save file as requested, which can be found in this link. It contains three files: two world folders and one file with save-related information. I hope this can help provide a report for the related bug.

https://reblock-my.sharepoint.com/:u:/g/personal/harasakinanodesu_reblock_onmicrosoft_com/EX91dD8b4VhIoG9keqPSPSwBmDnmLLRQ47eSuOc2s2cPtA?e=q4vER9

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[Mod] Jingy 2024-12-05T19:35:13Z

We do not have enough information to find the cause of this issue.

Please attach the affected (zipped) world file. If the file size is too large, please upload it somewhere else and then link to it here.

_{This issue is being temporarily resolved as}_{Awaiting Response}_{. Once the requested information has been delivered, the report will be reopened automatically.}

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[Mod] turbo 2024-12-08T02:19:50Z

Thank you for your report!
However, this issue is Invalid.

Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.

Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
A world which had previously been opened with a modified client might be corrupted. Please try reproducing the issue in a newly generated world.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers like Hypixel, please contact them first as they run modified server software.