Minor ConstructBlock logic tweak

core/src/mindustry/world/blocks/ConstructBlock.java

@@ -22,6 +22,8 @@ import mindustry.world.*;
 import mindustry.world.blocks.storage.CoreBlock.*;
 import mindustry.world.modules.*;
 
+import java.util.*;
+
 import static mindustry.Vars.*;
 
 /** A block in the process of construction. */
@@ -263,6 +265,11 @@ public class ConstructBlock extends Block{
         }
 
         public void deconstruct(Unit builder, @Nullable Building core, float amount){
+            //reset accumulated resources when switching modes
+            if(wasConstructing){
+                Arrays.fill(accumulator, 0);
+                Arrays.fill(totalAccumulator, 0);
+            }
             wasConstructing = false;
             activeDeconstruct = true;
             float deconstructMultiplier = state.rules.deconstructRefundMultiplier;