When creating a mob spawner xp farm on my server, I noticed the amount of mobs spawning has gone down significantly, I know the spawner spawns 3-4 mobs at a time, but they should continuously spawn, instead they spawn one wave of mobs until you kill them, this causes xp farms to have very little purpose, instead of killing around 30 mobs at once, I only am able to kill 4 until the next wave spawns.