Fixed #8084

core/src/mindustry/entities/comp/BuildingComp.java

@@ -380,6 +380,10 @@ abstract class BuildingComp implements Posc, Teamc, Healthc, Buildingc, Timerc,
         for(var edge : block.getEdges()){
             Building build = nearby(edge.x, edge.y);
             if(build != null && build.team == team && build instanceof HeatBlock heater){
+                //massive hack but I don't really care anymore
+                if(heater instanceof HeatConductorBuild cond){
+                    cond.updateHeat();
+                }
 
                 boolean split = build.block instanceof HeatConductor cond && cond.splitHeat;
                 // non-routers must face us, routers must face away - next to a redirector, they're forced to face away due to cycles anyway

core/src/mindustry/world/blocks/heat/HeatConductor.java

@@ -4,6 +4,7 @@ import arc.*;
 import arc.graphics.g2d.*;
 import arc.struct.*;
 import arc.util.*;
+import mindustry.*;
 import mindustry.entities.units.*;
 import mindustry.gen.*;
 import mindustry.graphics.*;
@@ -52,6 +53,7 @@ public class HeatConductor extends Block{
         public float heat = 0f;
         public float[] sideHeat = new float[4];
         public IntSet cameFrom = new IntSet();
+        public long lastHeatUpdate = -1;
 
         @Override
         public void draw(){
@@ -76,6 +78,13 @@ public class HeatConductor extends Block{
 
         @Override
         public void updateTile(){
+            updateHeat();
+        }
+
+        public void updateHeat(){
+            if(lastHeatUpdate == Vars.state.updateId) return;
+
+            lastHeatUpdate = Vars.state.updateId;
             heat = calculateHeat(sideHeat, cameFrom);
         }