diff --git a/core/src/mindustry/content/SerpuloTechTree.java b/core/src/mindustry/content/SerpuloTechTree.java
index 9517c5ebdf..062f8b3029 100644
--- a/core/src/mindustry/content/SerpuloTechTree.java
+++ b/core/src/mindustry/content/SerpuloTechTree.java
@@ -16,7 +16,6 @@ public class SerpuloTechTree{
         Planets.serpulo.techTree = nodeRoot("serpulo", coreShard, () -> {
 
             node(conveyor, () -> {
-
                 node(junction, () -> {
                     node(router, () -> {
                         node(advancedLaunchPad, Seq.with(new SectorComplete(extractionOutpost)), () -> {
@@ -73,7 +72,6 @@ public class SerpuloTechTree{
             });
 
             node(mechanicalDrill, () -> {
-
                 node(mechanicalPump, () -> {
                     node(conduit, () -> {
                         node(liquidJunction, () -> {
diff --git a/core/src/mindustry/world/Build.java b/core/src/mindustry/world/Build.java
index 9de54662ae..db70f50a96 100644
--- a/core/src/mindustry/world/Build.java
+++ b/core/src/mindustry/world/Build.java
@@ -96,6 +96,7 @@ public class Build{
             tile.build.changeTeam(team);
             tile.build.enabled = true;
             tile.build.checkAllowUpdate();
+            tile.build.updateProximity();
             tile.build.onRepaired();
 
             if(unit != null && unit.getControllerName() != null) tile.build.lastAccessed = unit.getControllerName();
diff --git a/core/src/mindustry/world/blocks/distribution/StackConveyor.java b/core/src/mindustry/world/blocks/distribution/StackConveyor.java
index 9bf0bcf4cf..406d44ecdb 100644
--- a/core/src/mindustry/world/blocks/distribution/StackConveyor.java
+++ b/core/src/mindustry/world/blocks/distribution/StackConveyor.java
@@ -193,7 +193,12 @@ public class StackConveyor extends Block implements Autotiler{
         public void dropped(){
             super.dropped();
             var prev = Geometry.d4[(rotation + 2) % 4];
-            link = Point2.pack(tile.x + prev.x, tile.y + prev.y);
+            if(items.any()){
+                link = Point2.pack(tile.x + prev.x, tile.y + prev.y);
+                cooldown = 0f;
+            }else{
+                link = -1;
+            }
         }
 
         @Override
@@ -201,7 +206,7 @@ public class StackConveyor extends Block implements Autotiler{
             Draw.z(Layer.block - 0.15f);
             super.drawCracks();
         }
-        
+
         @Override
         public void payloadDraw(){
             Draw.rect(block.fullIcon, x, y);
@@ -294,7 +299,6 @@ public class StackConveyor extends Block implements Autotiler{
             }else{ //transfer
                 if(state != stateLoad || (items.total() >= getMaximumAccepted(lastItem))){
                     if(front() instanceof StackConveyorBuild e && e.team == team){
-                        //sleep if its occupied
                         if(e.link == -1){
                             e.items.add(items);
                             e.lastItem = lastItem;