I'd love to see a photo or video of you at full draw. When this happens I normally see the anchor point too high. Meaning your nock is too low when your at full draw causing you to launch your arrow upward too much thusly having to raise the sights.

Bring your nock/arrow/kisser or whatever you use up toward your mouth more depending and it'll lower your point of impact plus lower your sights.

OR, lower your peep, it'll raise your nock point, lowering your bow, opening your sight window of the riser.