probably your fault theres a bug with meso explosion in that the mesos dont explode but still do damage if they kill something with that meso explosion, the mob will not drop anything nor yield any exp should also probably watch out if your bags arent exploding; it's a known bannable bug exploit
More importantly, why on earth do you have 30k mp (even if you have hb, isn’t that a bit too much)? You’re preparing for a future increase in max hp or something?