diff --git a/Changelog.txt b/Changelog.txt
index 51aff52e3..68e662288 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -1,3 +1,6 @@
+Version 2.1.191
+    Fixed a critical bug related to our BlockTracker
+    Some minor optimizations to our Block events
 Version 2.1.190
     Fixed a null error in BitSetChunkStore
 Version 2.1.189
diff --git a/pom.xml b/pom.xml
index bb75b4ba3..31d49fbbc 100755
--- a/pom.xml
+++ b/pom.xml
@@ -2,7 +2,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.gmail.nossr50.mcMMO</groupId>
     <artifactId>mcMMO</artifactId>
-    <version>2.1.190</version>
+    <version>2.1.191-SNAPSHOT</version>
     <name>mcMMO</name>
     <url>https://github.com/mcMMO-Dev/mcMMO</url>
     <scm>
diff --git a/src/main/java/com/gmail/nossr50/listeners/BlockListener.java b/src/main/java/com/gmail/nossr50/listeners/BlockListener.java
index 06c3a7c2e..658793842 100644
--- a/src/main/java/com/gmail/nossr50/listeners/BlockListener.java
+++ b/src/main/java/com/gmail/nossr50/listeners/BlockListener.java
@@ -123,10 +123,14 @@ public class BlockListener implements Listener {
 
         BlockFace direction = event.getDirection();
         Block movedBlock;
+        WorldCompatibilityLayer worldCompatibilityLayer = mcMMO.getCompatibilityManager().getWorldCompatibilityLayer();
 
-        for (Block b : event.getBlocks()) {
-            movedBlock = b.getRelative(direction);
-            mcMMO.getPlaceStore().setTrue(movedBlock);
+        for (Block block : event.getBlocks()) {
+            movedBlock = block.getRelative(direction);
+
+            if(BlockUtils.isWithinWorldBounds(worldCompatibilityLayer, movedBlock)) {
+                mcMMO.getPlaceStore().setTrue(movedBlock);
+            }
         }
     }
 
@@ -151,19 +155,15 @@ public class BlockListener implements Listener {
 
         WorldCompatibilityLayer worldCompatibilityLayer = mcMMO.getCompatibilityManager().getWorldCompatibilityLayer();
 
-        World world = movedBlock.getWorld();
-
         //Spigot makes bad things happen in its API
-        if(event.getBlock().getY() < worldCompatibilityLayer.getMaxWorldHeight(world) || event.getBlock().getY() >= worldCompatibilityLayer.getMinWorldHeight(world)) {
+        if(BlockUtils.isWithinWorldBounds(worldCompatibilityLayer, movedBlock)) {
             mcMMO.getPlaceStore().setTrue(movedBlock);
         }
 
         for (Block block : event.getBlocks()) {
-            if(block.getY() < worldCompatibilityLayer.getMaxWorldHeight(world) || block.getY() >= worldCompatibilityLayer.getMinWorldHeight(world)) {
+            if(BlockUtils.isWithinWorldBounds(worldCompatibilityLayer, block)) {
                 mcMMO.getPlaceStore().setTrue(block.getRelative(direction));
             }
-
-            mcMMO.getPlaceStore().setTrue(movedBlock);
         }
     }
 
@@ -180,11 +180,16 @@ public class BlockListener implements Listener {
         if(WorldBlacklist.isWorldBlacklisted(event.getBlock().getWorld()))
             return;
 
+
         BlockState blockState = event.getNewState();
 
-        if(ExperienceConfig.getInstance().isSnowExploitPrevented() && BlockUtils.shouldBeWatched(blockState))
-        {
-            mcMMO.getPlaceStore().setTrue(blockState.getBlock());
+        if(ExperienceConfig.getInstance().isSnowExploitPrevented() && BlockUtils.shouldBeWatched(blockState)) {
+            WorldCompatibilityLayer worldCompatibilityLayer = mcMMO.getCompatibilityManager().getWorldCompatibilityLayer();
+            Block block = blockState.getBlock();
+
+            if(BlockUtils.isWithinWorldBounds(worldCompatibilityLayer, block)) {
+                mcMMO.getPlaceStore().setTrue(block);
+            }
         }
     }
 
@@ -195,23 +200,19 @@ public class BlockListener implements Listener {
     public void onBlockFormEvent(BlockFormEvent event)
     {
         World world = event.getBlock().getWorld();
-        /* WORLD BLACKLIST CHECK */ {
-            if(WorldBlacklist.isWorldBlacklisted(world))
-                return;
-        }
 
-        BlockState newState = event.getNewState();
+        /* WORLD BLACKLIST CHECK */
+        if(WorldBlacklist.isWorldBlacklisted(world))
+            return;
 
         if(ExperienceConfig.getInstance().preventStoneLavaFarming()) {
+            BlockState newState = event.getNewState();
             WorldCompatibilityLayer worldCompatibilityLayer = mcMMO.getCompatibilityManager().getWorldCompatibilityLayer();
 
-            if(event.getBlock().getY() > worldCompatibilityLayer.getMaxWorldHeight(world) || event.getBlock().getY() < worldCompatibilityLayer.getMinWorldHeight(world)) {
-                return;
-            }
-
-            if(newState.getType() != Material.OBSIDIAN
-                    && ExperienceConfig.getInstance().doesBlockGiveSkillXP(PrimarySkillType.MINING, newState.getBlockData())) {
-                mcMMO.getPlaceStore().setTrue(newState);
+            if(newState.getType() != Material.OBSIDIAN && ExperienceConfig.getInstance().doesBlockGiveSkillXP(PrimarySkillType.MINING, newState.getBlockData())) {
+                if(BlockUtils.isWithinWorldBounds(worldCompatibilityLayer, newState.getBlock())) {
+                    mcMMO.getPlaceStore().setTrue(newState);
+                }
             }
         }
     }
@@ -224,16 +225,23 @@ public class BlockListener implements Listener {
     @EventHandler(priority = EventPriority.MONITOR)
     public void onBlockPlace(BlockPlaceEvent event) {
         BlockState blockState = event.getBlock().getState();
+        Block block = blockState.getBlock();
 
         /* Check if the blocks placed should be monitored so they do not give out XP in the future */
 //      if (!Tag.LOGS.isTagged(event.getBlockReplacedState().getType()) || !Tag.LOGS.isTagged(event.getBlockPlaced().getType()))
-        mcMMO.getPlaceStore().setTrue(blockState);
 
         /* WORLD BLACKLIST CHECK */
-        if(WorldBlacklist.isWorldBlacklisted(event.getBlock().getWorld())) {
+        if(WorldBlacklist.isWorldBlacklisted(block.getWorld())) {
             return;
         }
 
+        WorldCompatibilityLayer worldCompatibilityLayer = mcMMO.getCompatibilityManager().getWorldCompatibilityLayer();
+
+        if(BlockUtils.isWithinWorldBounds(worldCompatibilityLayer, block)) {
+            mcMMO.getPlaceStore().setTrue(blockState);
+        }
+
+
         Player player = event.getPlayer();
 
         if (!UserManager.hasPlayerDataKey(player)) {
@@ -260,18 +268,21 @@ public class BlockListener implements Listener {
      */
     @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
     public void onBlockMultiPlace(BlockMultiPlaceEvent event) {
-        for (BlockState replacedBlockState : event.getReplacedBlockStates())
-        {
+        for (BlockState replacedBlockState : event.getReplacedBlockStates()) {
             BlockState blockState = replacedBlockState.getBlock().getState();
+            Block block = blockState.getBlock();
+
+            WorldCompatibilityLayer worldCompatibilityLayer = mcMMO.getCompatibilityManager().getWorldCompatibilityLayer();
 
             /* Check if the blocks placed should be monitored so they do not give out XP in the future */
-            mcMMO.getPlaceStore().setTrue(blockState);
+            if(BlockUtils.isWithinWorldBounds(worldCompatibilityLayer, block)) {
+                mcMMO.getPlaceStore().setTrue(blockState);
+            }
         }
     }
 
     @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
-    public void onBlockGrow(BlockGrowEvent event)
-    {
+    public void onBlockGrow(BlockGrowEvent event) {
         Block block = event.getBlock();
         World world = block.getWorld();
 
@@ -280,10 +291,11 @@ public class BlockListener implements Listener {
             return;
 
         // Minecraft is dumb, the events still throw when a plant "grows" higher than the max block height.  Even though no new block is created
-        if (block.getY() >= world.getMaxHeight())
-            return;
+        WorldCompatibilityLayer worldCompatibilityLayer = mcMMO.getCompatibilityManager().getWorldCompatibilityLayer();
 
-        mcMMO.getPlaceStore().setFalse(block);
+        if(BlockUtils.isWithinWorldBounds(worldCompatibilityLayer, block)) {
+            mcMMO.getPlaceStore().setFalse(block);
+        }
     }
 
     /**
diff --git a/src/main/java/com/gmail/nossr50/util/BlockUtils.java b/src/main/java/com/gmail/nossr50/util/BlockUtils.java
index e1944f738..b81a54631 100644
--- a/src/main/java/com/gmail/nossr50/util/BlockUtils.java
+++ b/src/main/java/com/gmail/nossr50/util/BlockUtils.java
@@ -7,14 +7,17 @@ import com.gmail.nossr50.datatypes.skills.SubSkillType;
 import com.gmail.nossr50.mcMMO;
 import com.gmail.nossr50.skills.repair.Repair;
 import com.gmail.nossr50.skills.salvage.Salvage;
+import com.gmail.nossr50.util.compat.layers.world.WorldCompatibilityLayer;
 import com.gmail.nossr50.util.random.RandomChanceSkill;
 import com.gmail.nossr50.util.random.RandomChanceUtil;
 import org.bukkit.Material;
+import org.bukkit.World;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockState;
 import org.bukkit.block.data.Ageable;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.HashSet;
 
@@ -285,4 +288,11 @@ public final class BlockUtils {
     public static boolean isPartOfTree(Block rayCast) {
         return hasWoodcuttingXP(rayCast.getState()) || isNonWoodPartOfTree(rayCast.getType());
     }
+
+    public static boolean isWithinWorldBounds(@NotNull WorldCompatibilityLayer worldCompatibilityLayer, @NotNull Block block) {
+        World world = block.getWorld();
+
+        return block.getY() > worldCompatibilityLayer.getMinWorldHeight(world) || block.getY() < worldCompatibilityLayer.getMaxWorldHeight(world);
+    }
+
 }