If you set the world border to something like 10
teleport to the nether using;
/execute in minecraft:the_nether run tp @s ~ ~ ~
And if the nether is not generated yet it would glitch the game and setting the world border to its old size wouldn't fix it
The way to fix it:
Teleport back to the Overworld
Fix the World border
teleport back to nether
Comments 2
Thank you for your report!
We're tracking this issue in MC-121997, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Does MC-121997 explain your problem?