Abathur Mine Laying glitch

So I’m not sure if this is on all maps or maybe its just blackhearts, but when i was trying to lay down mines in unrevealed areas inside my mine laying radius the mines would just explode and deal no damage to any of the surrounding area. I know that this was a glitch because all of the opposing teams characters were accounted for and no minions were in the vicinity. It acted like the mines were placed because there was still a CD just no mines.