anvil damage broken

I decided to go around and name my animals i have gone thru 4 anvils naming less than a dozen animals all fresh anvils i know for a fact they are supposed to last longer than 3-4 uses could you guys please look into this

https://drive.google.com/drive/folders/1g2Lf6Z0-ICJ5wY_Io6QsvtHfDJ2zQqI7