All custom items show up in random categories, and not in the categories that I've specified in the code.

 

Here is a code example:
{
    "format_version": "1.10",
    "minecraft:item": {
        "description":

{             "identifier": "hs:candy_blueberry",             "category": "Equipment"         }

,

        "components":

{             "minecraft:icon": "candy_blueberry",             "minecraft:use_animation": "eat",             "minecraft:render_offsets": "apple"         }

    }
}