Custom items gain damage when hitting an entity faster than they should - approximately 2 damage per hit instead of one.
Steps to reproduce:
Download the add-on attached to this report
Apply it to a new world
Search in the creative inventory for an item called "Grass Sword" with the texture of an egg
This item has a durability of 15 and therefore should withstand 15 hits
Try hitting an entity with this item. You will observe that it breaks on the 8th hit.
Expected behaviour:
Custom items should gain one damage per one hit. They are supposed to break after as many hits as is their durability value, specified in the "max_durability" field of the "minecraft:durability" component (assuming the item had not been damaged by other means).
Actual behaviour:
Custom items will break after significantly fewer hits than would be expected given their durability.
Linked issues
Attachments
Comments 4

Thank you for your report!
However, this issue has been closed as Working as Intended.
Here is some information from the team that you might find helpful:
On the item, add a custom component:
• Building with Custom Components Microsoft Learn
for onBeforeDurability Damage:
• minecraft/server.ItemCustomComponent Interface Microsoft Learn
Then in scripting you can modify the durabilityDamage after registering the event:
• minecraft/server.ItemComponentBeforeDurabilityDamageEvent Class Microsoft Learn
If you need help or have a suggestion you might like to follow a link below.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki
Thank you for your report!
However, this issue has been closed as Working as Intended.
Here is some information from the team that you might find helpful:
On the item, add a custom component:
• Building with Custom Components Microsoft Learn
for onBeforeDurability Damage:
• minecraft/server.ItemCustomComponent Interface Microsoft Learn
Then in scripting you can modify the durabilityDamage after registering the event:
• minecraft/server.ItemComponentBeforeDurabilityDamageEvent Class Microsoft Learn
If you need help or have a suggestion you might like to follow a link below.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki