I don't know how much we can trust the ball tracking trail in replays after seeing so many shots go over the hole and not fall but.....
If you zoom in on the player using camera 2 in the replay, you'll see the trail change direction slightly about 2 feet in front of the player. As if it deflected off something in the bunker. See the photo below.
For comparison, I went to Kiawah #2 and drove into the same vicinity. After a couple of tries I managed to ding the shot with full back spin using the same R11 4I as the OP. There was no change in direction on my shot and I got the normal expected result as the ball carried 187 yds, well over the cross hazard.
In order to hit something about 2 feet in front of the ball the obstruction would need to be pretty high I would think. Looks like a WGT elevation mapping error to me.
Here's my replay if you're interested.