Alternate sync implementation for non-update blocks - Closes #11099

core/src/mindustry/world/Block.java

@@ -1240,6 +1240,10 @@ public class Block extends UnlockableContent implements Senseable{
             flags = flags.with(BlockFlag.hasFogRadius);
         }
 
+        if(sync){
+            flags = flags.with(BlockFlag.synced);
+        }
+
         //initialize default health based on size
         if(health == -1){
             boolean round = false;

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

@@ -71,6 +71,7 @@ public class CoreBlock extends StorageBlock{
         priority = TargetPriority.core;
         flags = EnumSet.of(BlockFlag.core);
         unitCapModifier = 10;
+        sync = false; //core items are synced elsewhere
         drawDisabled = false;
         canOverdrive = false;
         commandable = true;

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

@@ -21,6 +21,7 @@ public class StorageBlock extends Block{
         hasItems = true;
         solid = true;
         update = false;
+        sync = true;
         destructible = true;
         separateItemCapacity = true;
         group = BlockGroup.transportation;

core/src/mindustry/world/meta/BlockFlag.java

@@ -31,7 +31,8 @@ public enum BlockFlag{
     unitAssembler,
     hasFogRadius,
     steamVent,
-    blockRepair;
+    blockRepair,
+    synced;
 
     public final static BlockFlag[] all = values();