Add one more workaround for old creative tabs

src/main/java/ru/dbotthepony/mc/otm/mixin/ItemMixin.java

@@ -0,0 +1,26 @@
+package ru.dbotthepony.mc.otm.mixin;
+
+import net.minecraft.world.item.CreativeModeTab;
+import net.minecraft.world.item.Item;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+import ru.dbotthepony.mc.otm.OverdriveThatMatters;
+import ru.dbotthepony.mc.otm.registry.MCreativeTabsKt;
+
+@Mixin(Item.class)
+public abstract class ItemMixin {
+	@Inject(
+		at = @At("HEAD"),
+		method = "getItemCategory()Lnet/minecraft/world/item/CreativeModeTab;",
+		cancellable = true
+	)
+	public void getItemCategory$hook(CallbackInfoReturnable<CreativeModeTab> info) {
+		if (MCreativeTabsKt.getMainTabContents().contains((Item) ((Object) this))) {
+			info.setReturnValue(OverdriveThatMatters.INSTANCE.CREATIVE_TAB);
+		} else if (MCreativeTabsKt.getDecorativeTabContents().contains((Item) ((Object) this))) {
+			info.setReturnValue(OverdriveThatMatters.INSTANCE.CREATIVE_TAB_DECORATIVE);
+		}
+	}
+}

src/main/kotlin/ru/dbotthepony/mc/otm/registry/MCreativeTabs.kt

@@ -1,5 +1,6 @@
 package ru.dbotthepony.mc.otm.registry
 
+import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet
 import net.minecraft.core.NonNullList
 import net.minecraft.world.item.DyeColor
 import net.minecraft.world.item.Item
@@ -17,13 +18,20 @@ import ru.dbotthepony.mc.otm.core.registryName
 
 class CreativeTabOutput {
 	private val items = ArrayList<ItemStack>()
+	private val itemTypes = ObjectOpenHashSet<Item>()
 
 	fun accept(value: ItemLike) {
 		items.add(ItemStack(value.asItem()))
+		itemTypes.add(value.asItem())
 	}
 
 	fun accept(value: ItemStack) {
 		items.add(value)
+		itemTypes.add(value.item)
+	}
+
+	operator fun contains(item: Item): Boolean {
+		return item in itemTypes
 	}
 
 	fun fillIn(into: NonNullList<ItemStack>) {

src/main/resources/overdrive_that_matters.mixins.json

@@ -17,7 +17,8 @@
     "InventoryChangeTriggerMixin",
     "MixinPlayer",
     "HopperBlockEntityMixin",
-    "DispenserBlockEntityMixin"
+    "DispenserBlockEntityMixin",
+    "ItemMixin"
   ],
   "client": [
     "MixinGameRenderer",