Added more hints

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

@@ -29,9 +29,14 @@ abstract class CommanderComp implements Entityc, Posc{
     transient float minFormationSpeed;
 
     public void update(){
+        if(controlling.isEmpty()){
+            formation = null;
+        }
+
         if(formation != null){
             formation.anchor.set(x, y, 0);
             formation.updateSlots();
+            controlling.removeAll(u -> u.dead || !(u.controller() instanceof FormationAI ai && ai.leader == self()));
         }
     }
 
@@ -64,6 +69,8 @@ abstract class CommanderComp implements Entityc, Posc{
             }
         });
 
+        if(units.isEmpty()) return;
+
         //sort by hitbox size, then by distance
         units.sort(Structs.comps(Structs.comparingFloat(u -> -u.hitSize), Structs.comparingFloat(u -> u.dst2(this))));
         units.truncate(type.commandLimit);

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

@@ -45,7 +45,7 @@ abstract class MinerComp implements Itemsc, Posc, Teamc, Rotc, Drawc{
     }
 
     public boolean canMine(){
-        return type.mineSpeed > 0;
+        return type.mineSpeed > 0 && type.mineTier >= 0;
     }
 
     @Override