Miss/Damage not displayed correctly on fighter.

Describe the problem. Be as specific as possible!:
My fighter's level 60 and i train at robots lv 61. Sometimes when i hit them, it does no damage at all, and when i miss them, it does damage. it's pretty annoying and it slows down my training by a lot.

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Yeah, that was happening to me too on my bandit... at robos too actually.

Happend to me with slimes too. Did 600 damage to one and it had half health, then hit another freshly spawned one for 38 damage and it dies. Happens on my low lv warriors and archer.