Please fill out the template below to describe your issue. Doing so greatly helps us understand what happened!

Description
When i used the knife to cut down the grass it doesn't use any durability i think thats a bug

Steps to reproduce:
Well i did nothing i crafted it used it but doesn't show any durability

Expected behavior:
A clear and concise description of what you expected to happen.

Logs
Even if the game didn't crash, please submit your client/server logs as well. They contain vital information to troubleshoot the issue.

Screenshots
If applicable, add screenshots to help explain your problem.

Mod list:
Farmers delight
Forge
End remastered
Savage and Ravage
Hunter illager
The Conjuger
Optifine
Structure gel
Mowzie's Mobs
Alex's mobs
Mob Battle Mod
jei
guard villagers
citadel
abnormals core
Thank you for helping with the project! Your reports are appreciated!

That's actually normal vanilla behavior. 😄

Tools don't lose durability when breaking "instamine" blocks such as Grass, Saplings or Flowers; only Shears are an exception. I couldn't get the Knife to take damage from those either. It should still take damage if used against blocks with resistance, such as Leaves or Tatami.