"The equipped monster loses 1000 ATK, but it can attack your opponent directly."
This is so horribly worded/misleading. The subject is equipped monster, "it" should refer to the equip monster, therefore the opponent is whoever is opposing the equip monster. Not the owner of the bow's opponent.
so what the card says? it says "the equipped monster can attack YOUR opponent". and let me define the YOUR description from the card, the YOUR standpoint is from the one who controls the equip card, not the YOUR from the equipped monster stand point.
that means, if player A equipped star bow ceal to player B's monster, the "YOUR" opponent is still from player A standpoint since player A control ceal, so player B's monster can only atk directly player B, which is impossible
there no bug on this card if you equipped it to your card you can direct attack someone. you just have to be careful since the attack slide is so touchy, when you go to attack make sure the attacking arrow in in the back before you let go.