Fixed reconstructor commanding in multiplayer

core/src/mindustry/world/blocks/storage/CoreBlock.java

@@ -164,7 +164,7 @@ public class CoreBlock extends StorageBlock{
     }
 
     @Override
-    public void placeBegan(Tile tile, Block previous){
+    public void placeBegan(Tile tile, Block previous, Unit builder){
         //finish placement immediately when a block is replaced.
         if(previous instanceof CoreBlock){
             tile.setBlock(this, tile.team());
@@ -181,6 +181,8 @@ public class CoreBlock extends StorageBlock{
 
                 nextItems = null;
             }
+
+            Events.fire(new BlockBuildEndEvent(tile, builder, tile.team(), false, null));
         }
     }