Fixed #2722

core/src/mindustry/content/Blocks.java

@@ -208,6 +208,7 @@ public class Blocks implements ContentList{
             liquidDrop = Liquids.slag;
             isLiquid = true;
             cacheLayer = CacheLayer.slag;
+            attributes.set(Attribute.heat, 0.85f);
         }};
 
         stone = new Floor("stone");
@@ -1142,6 +1143,7 @@ public class Blocks implements ContentList{
             powerProduction = 1.8f;
             generateEffect = Fx.redgeneratespark;
             size = 2;
+            floating = true;
         }};
 
         steamGenerator = new BurnerGenerator("steam-generator"){{

core/src/mindustry/content/UnitTypes.java

@@ -935,7 +935,7 @@ public class UnitTypes implements ContentList{
             drag = 0.016f;
             flying = true;
             range = 140f;
-            hitSize = 18f;
+            hitSize = 20f;
             lowAltitude = true;
             armor = 5f;