This is a bug that has been going on for a while now. Where I will try to name an item in an anvil and after typing the new name, the output box is empty. I know it's not my XP because I have over 200 levels, and it's the first time I've tried to name this item. so it's not the "Too expensive" problem. There is no renamed items in the far right box to click on. And this is an issue on Windows 10 edition and Xbox one.
Related issues
Comments

Thank you for your report!
We're tracking this issue in REALMS-9214, 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