Mangrove trees are now properly marked natural from growth

Fixes #4810

src/main/java/com/gmail/nossr50/listeners/PlayerListener.java

@@ -844,13 +844,14 @@ public class PlayerListener implements Listener {
                 if(!event.isCancelled() || event.useInteractedBlock() != Event.Result.DENY) {
                     //TODO: Is this code to set false from bone meal even needed? I'll have to double check later.
                     if (heldItem.getType() == Material.BONE_MEAL) {
-                        switch (blockState.getType()) {
-                            case BEETROOTS:
-                            case CARROT:
-                            case COCOA:
-                            case WHEAT:
-                            case NETHER_WART_BLOCK:
-                            case POTATO:
+                        switch (blockState.getType().toString()) {
+                            case "BEETROOTS":
+                            case "CARROT":
+                            case "COCOA":
+                            case "WHEAT":
+                            case "NETHER_WART_BLOCK":
+                            case "POTATO":
+                            case "MANGROVE_PROPAGULE":
                                 mcMMO.getPlaceStore().setFalse(blockState);
                                 break;
                         }

src/main/java/com/gmail/nossr50/listeners/WorldListener.java

@@ -1,7 +1,10 @@
 package com.gmail.nossr50.listeners;
 
 import com.gmail.nossr50.config.WorldBlacklist;
+import com.gmail.nossr50.datatypes.player.McMMOPlayer;
 import com.gmail.nossr50.mcMMO;
+import com.gmail.nossr50.util.player.UserManager;
+import org.bukkit.Bukkit;
 import org.bukkit.Chunk;
 import org.bukkit.block.BlockState;
 import org.bukkit.event.EventHandler;
@@ -10,6 +13,7 @@ import org.bukkit.event.Listener;
 import org.bukkit.event.world.ChunkUnloadEvent;
 import org.bukkit.event.world.StructureGrowEvent;
 import org.bukkit.event.world.WorldUnloadEvent;
+import org.bukkit.scheduler.BukkitRunnable;
 
 public class WorldListener implements Listener {
     private final mcMMO plugin;
@@ -29,9 +33,11 @@ public class WorldListener implements Listener {
         if(WorldBlacklist.isWorldBlacklisted(event.getWorld()))
             return;
 
-        for (BlockState blockState : event.getBlocks()) {
-            mcMMO.getPlaceStore().setFalse(blockState);
-        }
+        Bukkit.getScheduler().scheduleSyncDelayedTask(mcMMO.p, () -> {
+            for (BlockState blockState : event.getBlocks()) {
+                mcMMO.getPlaceStore().setFalse(blockState);
+            }
+        }, 1);
     }
 
     /**