minecraft:repairable component doesn't always allow for repair in anvils

Using the “minecraft:repairable” component, specifying a repair_item for a custom item, and trying to repair it in an anvil produces mixed results. This is not the case for a vanilla diamond sword item, which works as expected.

If “repair_amount” is set to "600" (arbitrary value), and there’s more than one repair item in the repair item slot - the anvil will get damaged and make a repair sound, but the items will pop into the player’s inventory for a second and come back to the anvil interface. The item does get repaired if only one repair item is used.

If “repair_amount” is set to "context.other->query.remaining_durability + 0.05 * context.other->query.max_durability" (as documentation suggests) then the anvil does not allow further interaction to repair the item.

If “repair_amount” is set to "q.max_durability * 0.25" (as another documentation example shows) then the behavior is the same as for the first case with “600”.

In the attached video, the apple, bread and carrot items are using the three “repair_amount” values respectively. A world with the behavior pack is also attached.

Here’s a JSON of one of the item files:

{
    "format_version": "1.21.70",
    "minecraft:item": {
        "description": {
            "identifier": "custom:axe_2",
            "menu_category": {
                "category": "equipment",
                "group": "minecraft:itemGroup.name.axe"
            }
        },
        "components": {
            "minecraft:custom_components": [
                "custom:damage_when_mining"
            ],
            "minecraft:max_stack_size": 1,
            "minecraft:hand_equipped": true,
            "minecraft:durability": {
                "max_durability": 1562
            },
            "minecraft:icon": "bread",
            "minecraft:repairable": {
                "repair_items": [
                    {
                        "items": [ "custom:repair_item" ],
                        "repair_amount": "context.other->query.remaining_durability + 0.05 * context.other->query.max_durability"
                    }
                ]
            },
            "minecraft:digger": {
                "use_efficiency": true,
                "destroy_speeds": [
                    {
                        "block": {
                            "tags": "query.any_tag('minecraft:is_axe_item_destructible')"
                        },
                        "speed": 10
                    }
                ]
            }
        }
    }
}