Richard1969,
hard to say if it is a bug or a designed behavior based on the lie - best to submit it to WGT while in game by right-clicking in the game window and using the menu option to submit a bug report. This sends all of the pertinent hole data, etc to them, allows them to dig in to it.
Just don't hold your breath waiting for an answer.
oh, and you have to be quick to do this, or sometimes it takes long enough to process that your timer runs out for the next shot.
And as Nickuk stated above, the flop is a great choice of shots from green-side lies also. Takes some time to master it, but once you do, you'll be within 3-4 almost every time.