Fixed #2671

core/src/mindustry/world/blocks/distribution/ItemBridge.java

@@ -276,7 +276,10 @@ public class ItemBridge extends Block{
                     cycleSpeed = Mathf.lerpDelta(cycleSpeed, 4f, 0.05f); //TODO this is kinda broken, because lerping only happens on a timer
                 }else{
                     cycleSpeed = Mathf.lerpDelta(cycleSpeed, 1f, 0.01f);
-                    if(item != null) items.add(item, 1);
+                    if(item != null){
+                        items.add(item, 1);
+                        items.undoFlow(item);
+                    }
                 }
             }
         }

core/src/mindustry/world/modules/ItemModule.java

@@ -253,6 +253,12 @@ public class ItemModule extends BlockModule{
         }
     }
 
+    public void undoFlow(Item item){
+        if(flow != null){
+            cacheSums[item.id] -= 1;
+        }
+    }
+
     public void addAll(ItemModule items){
         for(int i = 0; i < items.items.length; i++){
             add(i, items.items[i]);