Fix CancelPacketHandleException in SmartPlaceListener

BauSystem_Main/src/de/steamwar/bausystem/features/smartplace/SmartPlaceListener.java

@@ -103,9 +103,14 @@ public class SmartPlaceListener implements Plain, Listener {
         Bukkit.getScheduler().runTaskLater(BauSystem.getInstance(), () -> {
             if (sneaking) SMART_PLACING.add(player);
             player.setSneaking(shouldSneak || sneaking);
+            try {
                 packetExecutor.invoke(playerConnection.get(getHandle.invoke(player)), packet);
+            } catch (Exception e) {
+                return;
+            } finally {
                 SMART_PLACING.remove(player);
                 player.setSneaking(sneaking);
+            }
 
             if (!WAS_EXECUTED.contains(player) && first) {
                 run(player, packet, false, sneaking, shouldSneak);