diff --git a/1.4/Assemblies/0PrepatcherAPI.dll b/1.4/Assemblies/0PrepatcherAPI.dll
index 2306a3b..d869ece 100644
Binary files a/1.4/Assemblies/0PrepatcherAPI.dll and b/1.4/Assemblies/0PrepatcherAPI.dll differ
diff --git a/1.4/Assemblies/PerformanceFish.dll b/1.4/Assemblies/PerformanceFish.dll
index f9f3571..52892d3 100644
Binary files a/1.4/Assemblies/PerformanceFish.dll and b/1.4/Assemblies/PerformanceFish.dll differ
diff --git a/1.4/Assemblies/PerformanceFish.pdb b/1.4/Assemblies/PerformanceFish.pdb
index e1956e5..a6e4688 100644
Binary files a/1.4/Assemblies/PerformanceFish.pdb and b/1.4/Assemblies/PerformanceFish.pdb differ
diff --git a/Source/PerformanceFish/JobSystem/WorkGiver_DoBillOptimization.cs b/Source/PerformanceFish/JobSystem/WorkGiver_DoBillOptimization.cs
index 25dc8ee..50a63a5 100644
--- a/Source/PerformanceFish/JobSystem/WorkGiver_DoBillOptimization.cs
+++ b/Source/PerformanceFish/JobSystem/WorkGiver_DoBillOptimization.cs
@@ -254,12 +254,11 @@ public class WorkGiver_DoBillOptimization : ClassWithFishPatches
 				
 				if (cachedSmallestList.Count != smallestFilter.allowedDefs.Count)
 				{
-					// Log.Warning($"Cached list count: {cachedSmallestList.Count}, actual filter list count: {
-					// 	smallestFilter.allowedDefs.Count}. Forcing a refresh now to fix.");
+					Log.Warning($"Cached list count: {cachedSmallestList.Count}, actual filter list count: {
+						smallestFilter.allowedDefs.Count}. Forcing a refresh now to fix.");
 					ThingFilterPatches.ForceSynchronizeCache(smallestFilter);
-					// Log.Warning($"New cached list count: {cachedSmallestList.Count}, actual filter list count: {
-					// 	smallestFilter.allowedDefs.Count}.");
-					// didn't trigger in 1.3, but now does. Fuck
+					Log.Warning($"New cached list count: {cachedSmallestList.Count}, actual filter list count: {
+						smallestFilter.allowedDefs.Count}.");
 				}
 
 				var smallestListCount = cachedSmallestList.Count;
diff --git a/Source/PerformanceFish/ThingFilterPatches.cs b/Source/PerformanceFish/ThingFilterPatches.cs
index 55f9df5..32dde8d 100644
--- a/Source/PerformanceFish/ThingFilterPatches.cs
+++ b/Source/PerformanceFish/ThingFilterPatches.cs
@@ -101,8 +101,12 @@ public class ThingFilterPatches : ClassWithFishPatches
 			= static () => default(ThingFilter)!.CopyAllowancesFrom(null);
 
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		public static void Prefix(ThingFilter __instance)
-			=> AllowedDefsListCache.GetAndCheck<AllowedDefsListCacheValue>(__instance).Defs.Clear();
+		public static void Prefix(ThingFilter __instance, ThingFilter other)
+		{
+			var defs = AllowedDefsListCache.GetAndCheck<AllowedDefsListCacheValue>(__instance).Defs;
+			defs.Clear();
+			defs.AddRange(other.AllowedThingDefs);
+		}
 	}
 
 	public class SetAllow_Patch : FishPatch