Brace height is a factor if hand (grip) is too much to the right in grip, or left if you are a " lefty," and is compounded if draw-length too long or stance is too closed.

Stand in normal stance and slightly move right foot 1/2 step forward if RH, or left foot 1/2 step forward. If wrist slap seems to stop, I suspect draw-length is too long.

Additionally, slightly bend your bow arm as " 2droptine" suggested. If you have a problem holding at full draw with a slightly bent bow-arm, draw-weight might be too much for you, or, again, draw-length is too long and you are needing to push the bow out as far as you can to keep your anchor off the back of your head.