fix (doesn't work? at least not with /place)

src/main/java/io/github/rektroth/whiteout/mixin/mc147659/CatSpawnMixin.java

@@ -0,0 +1,66 @@
+/*
+ * Patch for MC-147659
+ *
+ * Authored for CraftBukkit/Spigot by Jake Potrebic <[email protected]> on July 11, 2022.
+ * Ported to Fabric by Rektroth <[email protected]> on July 4, 2024.
+ */
+
+package io.github.rektroth.whiteout.mixin.mc147659;
+
+import com.llamalad7.mixinextras.sugar.Local;
+import com.llamalad7.mixinextras.sugar.ref.LocalRef;
+import net.minecraft.entity.passive.CatEntity;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.spawner.CatSpawner;
+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.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(CatSpawner.class)
+public abstract class CatSpawnMixin {
+	/**
+	 * Sets the cat's position before it's type is set.
+	 * @param pos       The cat's spawn position.
+	 * @param world     boilerplate
+	 * @param cir       boilerplate
+	 * @param catEntity The cat.
+	 */
+	@Inject(
+		at = @At(
+			target = "Lnet/minecraft/entity/passive/CatEntity;initialize(Lnet/minecraft/world/ServerWorldAccess;Lnet/minecraft/world/LocalDifficulty;Lnet/minecraft/entity/SpawnReason;Lnet/minecraft/entity/EntityData;)Lnet/minecraft/entity/EntityData;",
+			value = "INVOKE"
+		),
+		method = "spawn(Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/server/world/ServerWorld;)I"
+	)
+	private void refreshPositionAndAnglesBeforeInitialize(
+		BlockPos pos,
+		ServerWorld world,
+		CallbackInfoReturnable<Integer> cir,
+		@Local LocalRef<CatEntity> catEntity
+	) {
+		CatEntity cat2 = catEntity.get();
+		cat2.refreshPositionAndAngles(pos, 0.0F, 0.0F);
+		catEntity.set(cat2);
+	}
+
+	/**
+	 * Skips the old position set.
+	 * @param instance boilerplate
+	 * @param blockPos boilerplate
+	 * @param yaw      boilerplate
+	 * @param pitch    boilerplate
+	 */
+	@Redirect(
+		at = @At(
+			target = "Lnet/minecraft/entity/passive/CatEntity;refreshPositionAndAngles(Lnet/minecraft/util/math/BlockPos;FF)V",
+			value = "INVOKE"
+		),
+		method = "spawn(Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/server/world/ServerWorld;)I"
+	)
+	private void skipRefreshPositionAndAngles(CatEntity instance, BlockPos blockPos, float yaw, float pitch) {
+		// nothing
+	}
+}

src/main/resources/assets/whiteout/whiteout-mixin-config-default.properties

@@ -9,6 +9,7 @@ mc84789=true
 mc108513=false
 mc123450=true
 mc123848=true
+mc147659=false
 mc153086=true
 mc157464=true
 mc158900=false

src/main/resources/whiteout.mixins.json

@@ -17,6 +17,7 @@
     "mc108513.EndSpikeFeatureMixin",
     "mc123450.ItemFrameEntityMixin",
     "mc123848.ItemFrameEntityMixin",
+    "mc147659.CatSpawnMixin",
     "mc153086.BeaconBlockEntityMixin",
     "mc157464.VillagerTaskListProviderMixin",
     "mc158900.PlayerManagerMixin",