Unit enter payload command

core/src/mindustry/world/blocks/payloads/BlockProducer.java

@@ -30,6 +30,7 @@ public abstract class BlockProducer extends PayloadBlock{
         hasItems = true;
         solid = true;
         hasPower = true;
+        acceptsPayloads = false;
         rotate = true;
         regionRotated1 = 1;
 

core/src/mindustry/world/blocks/payloads/PayloadBlock.java

@@ -25,6 +25,7 @@ public class PayloadBlock extends Block{
         update = true;
         sync = true;
         group = BlockGroup.payloads;
+        acceptsPayloads = true;
         envEnabled |= Env.space | Env.underwater;
     }
 

core/src/mindustry/world/blocks/payloads/PayloadConveyor.java

@@ -30,6 +30,7 @@ public class PayloadConveyor extends Block{
         update = true;
         outputsPayload = true;
         noUpdateDisabled = true;
+        acceptsPayloads = true;
         priority = TargetPriority.transport;
         envEnabled |= Env.space | Env.underwater;
         sync = true;

core/src/mindustry/world/blocks/payloads/PayloadSource.java

@@ -37,6 +37,7 @@ public class PayloadSource extends PayloadBlock{
         noUpdateDisabled = true;
         clearOnDoubleTap = true;
         regionRotated1 = 1;
+        acceptsPayloads = false;
         commandable = true;
 
         config(Block.class, (PayloadSourceBuild build, Block block) -> {