Fix async execution native sync advancements;

bukkit/src/main/java/me/william278/husksync/bukkit/util/PlayerSetter.java

@@ -163,7 +163,8 @@ public class PlayerSetter {
                     ArrayList<DataSerializer.AdvancementRecord> advancementRecords
                             = DataSerializer.deserializeAdvancementData(data.getSerializedAdvancements());
 
-                    if (Settings.useNativeImplementation) {
+                    if (Settings.useNativeImplementation)
+                        Bukkit.getScheduler().runTaskAsynchronously(plugin, () -> {
                             try {
                                 nativeSyncPlayerAdvancements(player, advancementRecords);
                             } catch (Exception e) {
@@ -175,9 +176,8 @@ public class PlayerSetter {
                                 Settings.useNativeImplementation = false;
                                 setPlayerAdvancements(player, advancementRecords, data);
                                 plugin.getLogger().fine(e.toString());
-                            e.printStackTrace();
-                        }
                             }
+                        });
                     else setPlayerAdvancements(player, advancementRecords, data);
                 }
                 if (Settings.syncInventories) {
@@ -316,6 +316,7 @@ public class PlayerSetter {
             AdvancementUtils.startProgress(playerAdvancements, advancement, nativeAdvancementProgress);
         });
 
+        AdvancementUtils.markPlayerAdvancementsFirst(playerAdvancements);
         AdvancementUtils.ensureAllVisible(playerAdvancements);
     }
 

bukkit/src/main/java/me/william278/husksync/bukkit/util/nms/AdvancementUtils.java

@@ -16,6 +16,7 @@ public class AdvancementUtils {
     private final static Field PLAYER_ADVANCEMENTS;
     private final static Field CRITERIA_MAP;
     private final static Field CRITERIA_DATE;
+    private final static Field IS_FIRST_PACKET;
 
     private final static Method GET_HANDLE;
     private final static Method START_PROGRESS;
@@ -51,6 +52,17 @@ public class AdvancementUtils {
 
         ENSURE_ALL_VISIBLE = ThrowSupplier.get(() -> PLAYER_ADVANCEMENTS.getDeclaredMethod("c"));
         ENSURE_ALL_VISIBLE.setAccessible(true);
+
+        IS_FIRST_PACKET = ThrowSupplier.get(() -> PLAYER_ADVANCEMENTS.getDeclaredField("n"));
+        IS_FIRST_PACKET.setAccessible(true);
+    }
+
+    public static void markPlayerAdvancementsFirst(Object playerAdvancements) {
+        try {
+            IS_FIRST_PACKET.set(playerAdvancements, true);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e.getMessage(), e);
+        }
     }
 
     public static Object getPlayerAdvancements (Player player) {