@Venesard:
This fix work for now, I don't know if this should the correct fix, but for now is right.
You don't need upload your project because I get the same error: When someone try to fight with enemy on map (Blizz ABS), only one player can hit. When other players try, they can't deal any damage. When trying PvP, it's bugging the same way, only one player can fight, second one can just stay or run.
All scripts (Blizz ABS and RMX-OS with BlizzABS-Controller are the last version, not modified scripts).