Fixed #8602

core/src/mindustry/entities/comp/BuilderComp.java

@@ -47,6 +47,14 @@ abstract class BuilderComp implements Posc, Statusc, Teamc, Rotc{
         updateBuildLogic();
     }
 
+    @Override
+    public void afterRead(){
+        //why would this happen?
+        if(plans == null){
+            plans = new Queue<>(1);
+        }
+    }
+
     public void validatePlans(){
         if(plans.size > 0){
             Iterator<BuildPlan> it = plans.iterator();

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

@@ -492,12 +492,6 @@ public class CoreBlock extends StorageBlock{
 
             storageCapacity = itemCapacity + proximity().sum(e -> owns(e) ? e.block.itemCapacity : 0);
             proximity.each(this::owns, t -> {
-                //add inventory if there is something in it from a payload
-                if(t.items != items){
-                    items.add(t.items);
-                    t.items.clear();
-                }
-
                 t.items = items;
                 ((StorageBuild)t).linkedCore = this;
             });