[19w14b] Can't write a name on nametags

Friend and I were playing on the new snapshot and we had fished up some name tags. When we were going to use them we couldn't even type in a name.

What was expected:
Put the nametag into the anvil and click the box at top to type a name.
What happened:
Was not able to type a name therefore not able to use the nametag

Steps to Reproduce:
1. Take a new nametag and place it in an anvil.
2. Click the box on the top and try to type.

(Thank you Asteraoth! Sorry for the duplicate! Been awhile since I've played MC and didn't realize it was the anvil not the nametag. Thank you for your time and the re-direct.)