Heal *all* cores on game start

core/src/mindustry/core/Logic.java

@@ -185,11 +185,13 @@ public class Logic implements ApplicationListener{
             }
         }
 
-        //heal player cores on start - fixes any potential core health increases
-        for(var entity : state.rules.defaultTeam.cores()){
+        //heal all cores on game start
+        for(TeamData team : state.teams.getActive()){
+            for(var entity : team.cores){
                 entity.heal();
             }
         }
+    }
 
     public void reset(){
         State prev = state.getState();