Are you a right hand archer ? or left hand ? , If left bow and hand toqure will effect your arrow this way , if right too stiff and arrow , fletch contact anda long list of other things can cause this . This would be common fot a left hand archer , less common for a right hand archer .

I shoot right handed and tend to drift or hit left when I hold to tight on the bow. My index finger pulls on the front of the bow causing it to turn slightly to the left upon release. If my hand is a little sweaty from the humidity here that tends to happen a lot less.