Ohh and the fight of the bonus bandits that have a stolen items that i can recover from what it say the color of the logo is green
Do you, by chance, mean the "Bonus Battle 2" which at the start of the fights gives you a message which says:
"Special map feature:
The mage in the far east will deal 5 damage with a long distance fire spell to a random vanguard squad until he is defeated."?
If that is the battle you talk about, then it an intended feature, not a bug.