diff --git a/core/src/mindustry/ai/Pathfinder.java b/core/src/mindustry/ai/Pathfinder.java
index 78a596bb9d..b7b0cfc907 100644
--- a/core/src/mindustry/ai/Pathfinder.java
+++ b/core/src/mindustry/ai/Pathfinder.java
@@ -7,6 +7,7 @@ import arc.struct.*;
 import arc.util.*;
 import arc.util.async.*;
 import mindustry.annotations.Annotations.*;
+import mindustry.content.*;
 import mindustry.core.*;
 import mindustry.game.EventType.*;
 import mindustry.game.*;
@@ -116,7 +117,7 @@ public class Pathfinder implements Runnable{
             tile.getTeamID(),
             tile.solid(),
             tile.floor().isLiquid,
-            tile.staticDarkness() >= 2,
+            tile.staticDarkness() >= 2 || (tile.floor().solid && tile.block() == Blocks.air),
             nearLiquid,
             nearGround,
             nearSolid,
diff --git a/core/src/mindustry/game/Schematics.java b/core/src/mindustry/game/Schematics.java
index 45a919bebb..8fb2a01d23 100644
--- a/core/src/mindustry/game/Schematics.java
+++ b/core/src/mindustry/game/Schematics.java
@@ -418,13 +418,27 @@ public class Schematics implements Loadable{
     }
 
     public static void placeLoadout(Schematic schem, int x, int y, Team team, Block resource){
+        placeLoadout(schem, x, y, team, resource, true);
+    }
+
+    public static void placeLoadout(Schematic schem, int x, int y, Team team, Block resource, boolean check){
         Stile coreTile = schem.tiles.find(s -> s.block instanceof CoreBlock);
+        Seq<Tile> seq = new Seq<>();
         if(coreTile == null) throw new IllegalArgumentException("Loadout schematic has no core tile!");
         int ox = x - coreTile.x, oy = y - coreTile.y;
         schem.tiles.each(st -> {
             Tile tile = world.tile(st.x + ox, st.y + oy);
             if(tile == null) return;
 
+            //check for blocks that are in the way.
+            if(check && !(st.block instanceof CoreBlock)){
+                seq.clear();
+                tile.getLinkedTilesAs(st.block, seq);
+                if(seq.contains(t -> !t.block().alwaysReplace)){
+                    return;
+                }
+            }
+
             tile.setBlock(st.block, team, st.rotation);
 
             Object config = st.config;
diff --git a/core/src/mindustry/game/Universe.java b/core/src/mindustry/game/Universe.java
index cfb0a58b0f..afd19fc0d5 100644
--- a/core/src/mindustry/game/Universe.java
+++ b/core/src/mindustry/game/Universe.java
@@ -21,7 +21,7 @@ public class Universe{
     private int turn;
     private float turnCounter;
 
-    private Schematic lastLoadout;
+    private @Nullable Schematic lastLoadout;
     private ItemSeq lastLaunchResources = new ItemSeq();
 
     public Universe(){
@@ -92,6 +92,15 @@ public class Universe{
         }
     }
 
+    public void clearLoadoutInfo(){
+        lastLoadout = null;
+        lastLaunchResources = new ItemSeq();
+        Core.settings.remove("launch-resources-seq");
+        Core.settings.remove("lastloadout-core-shard");
+        Core.settings.remove("lastloadout-core-nucleus");
+        Core.settings.remove("lastloadout-core-foundation");
+    }
+
     public ItemSeq getLaunchResources(){
         lastLaunchResources = Core.settings.getJson("launch-resources-seq", ItemSeq.class, ItemSeq::new);
         return lastLaunchResources;
diff --git a/core/src/mindustry/input/InputHandler.java b/core/src/mindustry/input/InputHandler.java
index c282feaba5..41d1df4b16 100644
--- a/core/src/mindustry/input/InputHandler.java
+++ b/core/src/mindustry/input/InputHandler.java
@@ -159,9 +159,8 @@ public abstract class InputHandler implements InputProcessor, GestureListener{
         player.unit().eachGroup(unit -> {
             Item item = unit.item();
             int accepted = tile.acceptStack(item, unit.stack.amount, unit);
-            unit.stack.amount -= accepted;
 
-            Call.transferItemTo(item, accepted, unit.x, unit.y, tile);
+            Call.transferItemTo(unit, item, accepted, unit.x, unit.y, tile);
 
             if(unit == player.unit()){
                 Events.fire(new DepositEvent(tile, player, item, accepted));
diff --git a/core/src/mindustry/maps/generators/BaseGenerator.java b/core/src/mindustry/maps/generators/BaseGenerator.java
index 3a28078f74..035d654c10 100644
--- a/core/src/mindustry/maps/generators/BaseGenerator.java
+++ b/core/src/mindustry/maps/generators/BaseGenerator.java
@@ -60,7 +60,7 @@ public class BaseGenerator{
 
         for(Tile tile : cores){
             tile.clearOverlay();
-            Schematics.placeLoadout(coreschem.schematic, tile.x, tile.y, team, coreschem.required instanceof Item ? bases.ores.get((Item)coreschem.required) : Blocks.oreCopper);
+            Schematics.placeLoadout(coreschem.schematic, tile.x, tile.y, team, coreschem.required instanceof Item ? bases.ores.get((Item)coreschem.required) : Blocks.oreCopper, false);
 
             //fill core with every type of item (even non-material)
             Building entity = tile.build;
diff --git a/core/src/mindustry/ui/dialogs/SettingsMenuDialog.java b/core/src/mindustry/ui/dialogs/SettingsMenuDialog.java
index 2e66d333bd..8de3384027 100644
--- a/core/src/mindustry/ui/dialogs/SettingsMenuDialog.java
+++ b/core/src/mindustry/ui/dialogs/SettingsMenuDialog.java
@@ -121,6 +121,7 @@ public class SettingsMenuDialog extends SettingsDialog{
 
             t.button("@settings.clearresearch", Icon.trash, style, () -> {
                 ui.showConfirm("@confirm", "@settings.clearresearch.confirm", () -> {
+                    universe.clearLoadoutInfo();
                     for(TechNode node : TechTree.all){
                         node.reset();
                     }
diff --git a/core/src/mindustry/world/blocks/distribution/StackConveyor.java b/core/src/mindustry/world/blocks/distribution/StackConveyor.java
index 48ac8c8138..6454cdb5bf 100644
--- a/core/src/mindustry/world/blocks/distribution/StackConveyor.java
+++ b/core/src/mindustry/world/blocks/distribution/StackConveyor.java
@@ -58,16 +58,16 @@ public class StackConveyor extends Block implements Autotiler{
 
     @Override
     public boolean blends(Tile tile, int rotation, int otherx, int othery, int otherrot, Block otherblock){
-        if(tile.build instanceof StackConveyorBuild){
-            int state = ((StackConveyorBuild)tile.build).state;
+        if(tile.build instanceof StackConveyorBuild b){
+            int state = b.state;
             if(state == stateLoad){ //standard conveyor mode
                 return otherblock.outputsItems() && lookingAtEither(tile, rotation, otherx, othery, otherrot, otherblock);
             }else if(state == stateUnload){ //router mode
                 return otherblock.acceptsItems &&
                     (notLookingAt(tile, rotation, otherx, othery, otherrot, otherblock) ||
                     (otherblock instanceof StackConveyor && facing(otherx, othery, otherrot, tile.x, tile.y))) &&
-                    !(world.build(otherx, othery) instanceof StackConveyorBuild && ((StackConveyorBuild)world.build(otherx, othery)).state == stateUnload) &&
-                    !(world.build(otherx, othery) instanceof StackConveyorBuild && ((StackConveyorBuild)world.build(otherx, othery)).state == stateMove &&
+                    !(world.build(otherx, othery) instanceof StackConveyorBuild s && s.state == stateUnload) &&
+                    !(world.build(otherx, othery) instanceof StackConveyorBuild s2 && s2.state == stateMove &&
                         !facing(otherx, othery, otherrot, tile.x, tile.y));
             }
         }