What sometimes happens is what WGT is able to show as the ball position on one of the photos for that course is not exactly the same as the position the software calculates.
We sometimes see that our ball is in the rough but the software says our ball is on the fairway. Or the other way around. It looks like our ball is on the fairway but the software says our ball is in the rough.
So it's not a bug, just an inherent part of the game.
C'est la vie