It may be that your eye is a little to the left of the arrow. When you shoot instinctively, your brain adjusts to that and you hit the target. On the other hand, if you notice the arrow tip, you will notice that it is lined up a little to the right of the target. You might move it to the left, without really thinking about it, to get it more lined up with the target, thus missing to the left.
The same with elevation. When you notice the arrow tip, you move it a little higher than you would if you ignore it and shoot instinctively.
This may or may not be your problem, but once you're aware of it, it's easy enough to correct. If you miss high and left, for the next shot, just be sure you're focusing on the target and not at all on the arrow tip. If that corrects your problem, then you know.
You could also train yourself to hold your eye directly over the arrow. This would eliminate the left-right problem, but not the high-low problem if you shift your focus from the target to the arrow tip.