ClientMods/ItemAttributeFix/Plugin.cs

using Aki.Reflection.Patching;
using BepInEx;
using EFT.UI;
using System.Reflection;

namespace IcyClawz.ItemAttributeFix
{
    [BepInPlugin("com.IcyClawz.ItemAttributeFix", "IcyClawz.ItemAttributeFix", "1.2.0")]
    public class Plugin : BaseUnityPlugin
    {
        private void Awake()
        {
            new CompactCharacteristicPanelPatch().Enable();
        }
    }

    internal class CompactCharacteristicPanelPatch : ModulePatch
    {
        private static readonly FieldInfo ItemAttributeField =
            typeof(CompactCharacteristicPanel).GetField("ItemAttribute", BindingFlags.NonPublic | BindingFlags.Instance);

        private static readonly FieldInfo StringField =
            typeof(CompactCharacteristicPanel).GetField("string_0", BindingFlags.NonPublic | BindingFlags.Instance);

        protected override MethodBase GetTargetMethod() =>
            typeof(CompactCharacteristicPanel).GetMethod("SetValues", BindingFlags.Public | BindingFlags.Instance);
        
        [PatchPostfix]
        private static void PatchPostfix(ref CompactCharacteristicPanel __instance)
        {
            ItemAttributeClass attribute = ItemAttributeField.GetValue(__instance) as ItemAttributeClass;
            StringField.SetValue(__instance, attribute.FullStringValue());
        }
    }
}