diff --git a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/Filter.java b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/Filter.java
index a97ab05f7c..9c19862f44 100644
--- a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/Filter.java
+++ b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/Filter.java
@@ -23,4 +23,8 @@ public interface Filter<T, S extends Filter<T, S>> extends Predicate<T> {
     default boolean isBlackList() {
         return false;
     }
+
+    default boolean isBlank() {
+        return false;
+    }
 }
diff --git a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/FilterHandler.java b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/FilterHandler.java
index ca2f9dd9ad..5855d4c1be 100644
--- a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/FilterHandler.java
+++ b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/FilterHandler.java
@@ -117,7 +117,13 @@ public FilterHandler<T, F> onFilterUpdated(Consumer<F> onFilterUpdated) {
 
     private CustomItemStackHandler getFilterSlot() {
         if (this.filterSlot == null) {
-            this.filterSlot = new CustomItemStackHandler(this.filterItem);
+            this.filterSlot = new CustomItemStackHandler(this.filterItem) {
+
+                @Override
+                public int getSlotLimit(int slot) {
+                    return 1;
+                }
+            };
 
             this.filterSlot.setFilter(this::canInsertFilterItem);
         }
diff --git a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SimpleFluidFilter.java b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SimpleFluidFilter.java
index 124d1096e2..764ed6949d 100644
--- a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SimpleFluidFilter.java
+++ b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SimpleFluidFilter.java
@@ -73,7 +73,15 @@ public void setOnUpdated(Consumer<FluidFilter> onUpdated) {
         };
     }
 
+    @Override
+    public boolean isBlank() {
+        return !isBlackList && !ignoreNbt && Arrays.stream(matches).allMatch(FluidStack::isEmpty);
+    }
+
     public CompoundTag saveFilter() {
+        if (isBlank()) {
+            return null;
+        }
         var tag = new CompoundTag();
         tag.putBoolean("isBlackList", isBlackList);
         tag.putBoolean("matchNbt", ignoreNbt);
diff --git a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SimpleItemFilter.java b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SimpleItemFilter.java
index 16c7009f03..bf7ab9857c 100644
--- a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SimpleItemFilter.java
+++ b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SimpleItemFilter.java
@@ -72,7 +72,15 @@ public void setOnUpdated(Consumer<ItemFilter> onUpdated) {
         };
     }
 
+    @Override
+    public boolean isBlank() {
+        return !isBlackList && !ignoreNbt && Arrays.stream(matches).allMatch(ItemStack::isEmpty);
+    }
+
     public CompoundTag saveFilter() {
+        if (isBlank()) {
+            return null;
+        }
         var tag = new CompoundTag();
         tag.putBoolean("isBlackList", isBlackList);
         tag.putBoolean("matchNbt", ignoreNbt);
diff --git a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SmartItemFilter.java b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SmartItemFilter.java
index dcd3d916dc..f955c313d3 100644
--- a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SmartItemFilter.java
+++ b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/SmartItemFilter.java
@@ -49,8 +49,16 @@ public void setOnUpdated(Consumer<ItemFilter> onUpdated) {
         };
     }
 
+    @Override
+    public boolean isBlank() {
+        return filterMode.ordinal() == 0;
+    }
+
     @Override
     public CompoundTag saveFilter() {
+        if (isBlank()) {
+            return null;
+        }
         var tag = new CompoundTag();
         tag.putInt("filterMode", filterMode.ordinal());
         return tag;
diff --git a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagFilter.java b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagFilter.java
index 11dd35cc9f..40f7719173 100644
--- a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagFilter.java
+++ b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagFilter.java
@@ -40,7 +40,15 @@ public abstract class TagFilter<T, S extends Filter<T, S>> implements Filter<T,
 
     protected TagFilter() {}
 
+    @Override
+    public boolean isBlank() {
+        return oreDictFilterExpression.isBlank();
+    }
+
     public CompoundTag saveFilter() {
+        if (isBlank()) {
+            return null;
+        }
         var tag = new CompoundTag();
         tag.putString("oreDict", oreDictFilterExpression);
         return tag;
diff --git a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagFluidFilter.java b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagFluidFilter.java
index 4317599dca..c35e74f4de 100644
--- a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagFluidFilter.java
+++ b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagFluidFilter.java
@@ -10,6 +10,7 @@
 import it.unimi.dsi.fastutil.objects.Object2BooleanMap;
 import it.unimi.dsi.fastutil.objects.Object2BooleanOpenHashMap;
 
+import java.util.Objects;
 import java.util.function.Consumer;
 
 /**
@@ -24,7 +25,8 @@ public class TagFluidFilter extends TagFilter<FluidStack, FluidFilter> implement
     protected TagFluidFilter() {}
 
     public static TagFluidFilter loadFilter(ItemStack itemStack) {
-        return loadFilter(itemStack.getOrCreateTag(), filter -> itemStack.setTag(filter.saveFilter()));
+        return loadFilter(Objects.requireNonNullElseGet(itemStack.getTag(), CompoundTag::new),
+                filter -> itemStack.setTag(filter.saveFilter()));
     }
 
     private static TagFluidFilter loadFilter(CompoundTag tag, Consumer<FluidFilter> itemWriter) {
diff --git a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagItemFilter.java b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagItemFilter.java
index f50bb95b75..06fff4d384 100644
--- a/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagItemFilter.java
+++ b/src/main/java/com/gregtechceu/gtceu/api/cover/filter/TagItemFilter.java
@@ -9,6 +9,7 @@
 import it.unimi.dsi.fastutil.objects.Object2BooleanMap;
 import it.unimi.dsi.fastutil.objects.Object2BooleanOpenHashMap;
 
+import java.util.Objects;
 import java.util.function.Consumer;
 
 /**
@@ -23,7 +24,8 @@ public class TagItemFilter extends TagFilter<ItemStack, ItemFilter> implements I
     protected TagItemFilter() {}
 
     public static TagItemFilter loadFilter(ItemStack itemStack) {
-        return loadFilter(itemStack.getOrCreateTag(), filter -> itemStack.setTag(filter.saveFilter()));
+        return loadFilter(Objects.requireNonNullElseGet(itemStack.getTag(), CompoundTag::new),
+                filter -> itemStack.setTag(filter.saveFilter()));
     }
 
     private static TagItemFilter loadFilter(CompoundTag tag, Consumer<ItemFilter> itemWriter) {