Checks to prevent uncaptureable sectors

core/src/mindustry/world/blocks/units/UnitFactory.java

@@ -14,6 +14,7 @@ import mindustry.entities.*;
 import mindustry.entities.units.*;
 import mindustry.gen.*;
 import mindustry.graphics.*;
+import mindustry.logic.*;
 import mindustry.type.*;
 import mindustry.ui.*;
 import mindustry.world.blocks.*;
@@ -122,6 +123,12 @@ public class UnitFactory extends UnitBlock{
             return currentPlan == -1 ? 0 : progress / plans.get(currentPlan).time;
         }
 
+        @Override
+        public Object senseObject(LAccess sensor){
+            if(sensor == LAccess.config) return currentPlan == -1 ? null : plans.get(currentPlan).unit;
+            return super.senseObject(sensor);
+        }
+
         @Override
         public void buildConfiguration(Table table){
             Seq<UnitType> units = Seq.with(plans).map(u -> u.unit).filter(u -> u.unlockedNow());