Hello,
Xbox one live version v1.2.11
If you have make copy of your save on xbox one and copy again and again can't edit anymore the name of the world. If characters are more of 25 characters or a little bit less, you can't edit anymore the name, just bugging and don't take change.
For example if name is : copy of copy of copy of copy of copy of copy of copy of copy my world, just can't erase, add a letter or anything. Just don't work. I tried to wait 5 min when typing or erasing nothing change.
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-29254
It has been linked to this report. If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki