This does not sounds like a Bedrock Server issue....
This does not sounds like a Bedrock Server issue....
I am also having this issue with my server that runs Windows 7. I hope they change this so it can be run on Windows 7 machines since my server runs a lot of stuff and would be a huge task to upgrade to Windows 10 and ensure all my services still work.
This happened to me as well. Eventually I was able to name items again. I don't know if it was just being logged out and then logging in again another day or if it was me downloading the world backup, making changes to my addon and then re-uploading the world.