diff --git a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_15_R2.java b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_15_R2.java
index 45d98818c..937fc5de8 100644
--- a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_15_R2.java
+++ b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_15_R2.java
@@ -185,10 +185,12 @@ public class Regen_v1_15_R2 extends Regenerator<IChunkAccess, ProtoChunk, Chunk,
             public void doTick(BooleanSupplier booleansupplier) { //no ticking
             }
 
+            private final BiomeBase singleBiome = options.hasBiomeType() ? IRegistry.BIOME.get(MinecraftKey.a(options.getBiomeType().getId())) : null;
+
             @Override
             public BiomeBase a(int i, int k, int j) {
                 if (options.hasBiomeType()) {
-                    return IRegistry.BIOME.get(MinecraftKey.a(options.getBiomeType().getId()));
+                    return singleBiome;
                 }
                 return this.getChunkProvider().getChunkGenerator().getWorldChunkManager().getBiome(i, j, k);
             }
diff --git a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_16_R1.java b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_16_R1.java
index 7f6ea9630..7ac07b920 100644
--- a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_16_R1.java
+++ b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_16_R1.java
@@ -203,10 +203,12 @@ public class Regen_v1_16_R1 extends Regenerator<IChunkAccess, ProtoChunk, Chunk,
             public void doTick(BooleanSupplier booleansupplier) { //no ticking
             }
 
+            private final BiomeBase singleBiome = options.hasBiomeType() ? IRegistry.BIOME.get(MinecraftKey.a(options.getBiomeType().getId())) : null;
+
             @Override
             public BiomeBase a(int i, int j, int k) {
                 if (options.hasBiomeType()) {
-                    return IRegistry.BIOME.get(MinecraftKey.a(options.getBiomeType().getId()));
+                    return singleBiome;
                 }
                 return this.getChunkProvider().getChunkGenerator().getWorldChunkManager().getBiome(i, j, k);
             }
diff --git a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_16_R2.java b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_16_R2.java
index 52286b124..9bbee25ed 100644
--- a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_16_R2.java
+++ b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/regen/Regen_v1_16_R2.java
@@ -208,10 +208,12 @@ public class Regen_v1_16_R2 extends Regenerator<IChunkAccess, ProtoChunk, Chunk,
             public void doTick(BooleanSupplier booleansupplier) { //no ticking
             }
 
+            private final BiomeBase singleBiome = options.hasBiomeType() ? RegistryGeneration.WORLDGEN_BIOME.get(MinecraftKey.a(options.getBiomeType().getId())) : null;
+
             @Override
             public BiomeBase a(int i, int j, int k) {
                 if (options.hasBiomeType()) {
-                    return RegistryGeneration.WORLDGEN_BIOME.get(MinecraftKey.a(options.getBiomeType().getId()));
+                    return singleBiome;
                 }
                 return this.getChunkProvider().getChunkGenerator().getWorldChunkManager().getBiome(i, j, k);
             }