2.1 vs 2.2: on the old build even Smart spent no ammo, on the new one the counter lies

On 2.1 the ammo cheat was basically infinite. Even Smart did not consume rounds. On 2.2 the number jumps while the burst still fires.

Phantom Liberty did not break the trainer by itself. Only this UI did.

If you are on 2.13, see the neighboring post. That one is already about vehicles.