diff --git a/paper-api/src/main/java/org/bukkit/event/block/BlockCanBuildEvent.java b/paper-api/src/main/java/org/bukkit/event/block/BlockCanBuildEvent.java
index 31fd64187f..f5923049bf 100644
--- a/paper-api/src/main/java/org/bukkit/event/block/BlockCanBuildEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/block/BlockCanBuildEvent.java
@@ -102,7 +102,7 @@ public class BlockCanBuildEvent extends BlockEvent {
      */
     @NotNull
     public BlockData getBlockData() {
-        return blockData;
+        return blockData.clone(); // Paper - clone because mutation isn't used
     }
 
     /**
diff --git a/paper-api/src/main/java/org/bukkit/event/entity/EntityChangeBlockEvent.java b/paper-api/src/main/java/org/bukkit/event/entity/EntityChangeBlockEvent.java
index 1a9575ad4c..24e1a49e48 100644
--- a/paper-api/src/main/java/org/bukkit/event/entity/EntityChangeBlockEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/entity/EntityChangeBlockEvent.java
@@ -61,7 +61,7 @@ public class EntityChangeBlockEvent extends EntityEvent implements Cancellable {
      */
     @NotNull
     public BlockData getBlockData() {
-        return to;
+        return to.clone(); // Paper - clone because mutation isn't used
     }
 
     @NotNull
diff --git a/paper-api/src/main/java/org/bukkit/event/entity/EntityExplodeEvent.java b/paper-api/src/main/java/org/bukkit/event/entity/EntityExplodeEvent.java
index 50161d313c..e468e55d42 100644
--- a/paper-api/src/main/java/org/bukkit/event/entity/EntityExplodeEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/entity/EntityExplodeEvent.java
@@ -72,7 +72,7 @@ public class EntityExplodeEvent extends EntityEvent implements Cancellable {
      */
     @NotNull
     public Location getLocation() {
-        return location;
+        return location.clone(); // Paper - clone to avoid changes
     }
 
     /**
diff --git a/paper-api/src/main/java/org/bukkit/event/entity/EntityPortalEnterEvent.java b/paper-api/src/main/java/org/bukkit/event/entity/EntityPortalEnterEvent.java
index d3724db0a5..8b2caf665b 100644
--- a/paper-api/src/main/java/org/bukkit/event/entity/EntityPortalEnterEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/entity/EntityPortalEnterEvent.java
@@ -35,7 +35,7 @@ public class EntityPortalEnterEvent extends EntityEvent implements org.bukkit.ev
      */
     @NotNull
     public Location getLocation() {
-        return location;
+        return location.clone(); // Paper - clone to avoid changes
     }
 
     // Paper start
diff --git a/paper-api/src/main/java/org/bukkit/event/entity/ItemDespawnEvent.java b/paper-api/src/main/java/org/bukkit/event/entity/ItemDespawnEvent.java
index 6fc66197eb..2bb29fa449 100644
--- a/paper-api/src/main/java/org/bukkit/event/entity/ItemDespawnEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/entity/ItemDespawnEvent.java
@@ -46,7 +46,7 @@ public class ItemDespawnEvent extends EntityEvent implements Cancellable {
      */
     @NotNull
     public Location getLocation() {
-        return location;
+        return location.clone(); // Paper - clone to avoid changes
     }
 
     @NotNull
diff --git a/paper-api/src/main/java/org/bukkit/event/vehicle/VehicleBlockCollisionEvent.java b/paper-api/src/main/java/org/bukkit/event/vehicle/VehicleBlockCollisionEvent.java
index d0a437bd8a..50fad23cf4 100644
--- a/paper-api/src/main/java/org/bukkit/event/vehicle/VehicleBlockCollisionEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/vehicle/VehicleBlockCollisionEvent.java
@@ -31,7 +31,7 @@ public class VehicleBlockCollisionEvent extends VehicleCollisionEvent {
      */
     @NotNull
     public org.bukkit.util.Vector getVelocity() {
-        return velocity;
+        return velocity.clone();
     }
     // Paper end
 
diff --git a/paper-api/src/main/java/org/bukkit/event/vehicle/VehicleMoveEvent.java b/paper-api/src/main/java/org/bukkit/event/vehicle/VehicleMoveEvent.java
index 7bfb84d394..fc4cf7b21b 100644
--- a/paper-api/src/main/java/org/bukkit/event/vehicle/VehicleMoveEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/vehicle/VehicleMoveEvent.java
@@ -27,7 +27,7 @@ public class VehicleMoveEvent extends VehicleEvent {
      */
     @NotNull
     public Location getFrom() {
-        return from;
+        return from.clone(); // Paper - clone to avoid changes
     }
 
     /**
@@ -37,7 +37,7 @@ public class VehicleMoveEvent extends VehicleEvent {
      */
     @NotNull
     public Location getTo() {
-        return to;
+        return to.clone(); // Paper - clone to avoid changes
     }
 
 
diff --git a/paper-api/src/main/java/org/bukkit/event/world/GenericGameEvent.java b/paper-api/src/main/java/org/bukkit/event/world/GenericGameEvent.java
index 2a2a329877..fb975fefc7 100644
--- a/paper-api/src/main/java/org/bukkit/event/world/GenericGameEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/world/GenericGameEvent.java
@@ -49,7 +49,7 @@ public class GenericGameEvent extends WorldEvent implements Cancellable {
      */
     @NotNull
     public Location getLocation() {
-        return location;
+        return location.clone(); // Paper - clone to avoid changes
     }
 
     /**
diff --git a/paper-api/src/main/java/org/bukkit/event/world/SpawnChangeEvent.java b/paper-api/src/main/java/org/bukkit/event/world/SpawnChangeEvent.java
index 9ce93d0093..73997ae04f 100644
--- a/paper-api/src/main/java/org/bukkit/event/world/SpawnChangeEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/world/SpawnChangeEvent.java
@@ -25,7 +25,7 @@ public class SpawnChangeEvent extends WorldEvent {
      */
     @NotNull
     public Location getPreviousLocation() {
-        return previousLocation;
+        return previousLocation.clone(); // Paper - clone to avoid changes
     }
 
     @NotNull
diff --git a/paper-api/src/main/java/org/bukkit/event/world/StructureGrowEvent.java b/paper-api/src/main/java/org/bukkit/event/world/StructureGrowEvent.java
index 7af8d6e51c..783e74bc38 100644
--- a/paper-api/src/main/java/org/bukkit/event/world/StructureGrowEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/world/StructureGrowEvent.java
@@ -39,7 +39,7 @@ public class StructureGrowEvent extends WorldEvent implements Cancellable {
      */
     @NotNull
     public Location getLocation() {
-        return location;
+        return location.clone(); // Paper - clone to avoid changes
     }
 
     /**