Fix random ticks (Fixes #2990) (#2992)

Spigot-Server-Patches/0438-Optimise-random-block-ticking.patch

@@ -328,6 +328,19 @@ index 44aed67274..fa664897fb 100644
      @FunctionalInterface
      public interface a<T> {
  
+diff --git a/src/main/java/net/minecraft/server/EntityTurtle.java b/src/main/java/net/minecraft/server/EntityTurtle.java
+index dd02cb34..b24a5100 100644
+--- a/src/main/java/net/minecraft/server/EntityTurtle.java
++++ b/src/main/java/net/minecraft/server/EntityTurtle.java
+@@ -29,7 +29,7 @@ public class EntityTurtle extends EntityAnimal {
+ 
+     public final void setHome(BlockPosition pos) { g(pos); } // Paper - OBFHELPER
+     public void g(BlockPosition blockposition) {
+-        this.datawatcher.set(EntityTurtle.bx, blockposition);
++        this.datawatcher.set(EntityTurtle.bx, blockposition.immutableCopy()); // Paper - make sure home position can't change
+     }
+ 
+     public final BlockPosition getHome() { return this.es(); } // Paper - OBFHELPER
 diff --git a/src/main/java/net/minecraft/server/IBlockData.java b/src/main/java/net/minecraft/server/IBlockData.java
 index de43881653..e821c236b4 100644
 --- a/src/main/java/net/minecraft/server/IBlockData.java