I suppose this may be the same/similar bug I encountered today. I was playing a tedious practice round trying out two very different methods of calculating a required/equivalent distance for the given wind and elevation. I was taking alot of mulligans playing different kinds of shots and recording the shot data and the results (so I can sort them later and look for trends). I had played through 7 holes when I hit the last shot on the last ball (3rd of the round) and got the question about buying the same ball or using the starters.
I selected "buy" and got a message like "Oops, something went wrong - go directly to the Pro Shop to make this purchase". When the message closed, I had the little red marker by the ball - which I clicked and again got the offer to buy the balls. Did that and got the same Oops.
I wish I had remembered this thread then - but I did not. I thought - well I guess I can try the Pro Shop - so I did. After buying the sleeve I clicked the button to show Equipment and then got a confusing pop-up in the gameclient.
It said something to the effect of "If you follow the link, the game will end. Do you want to continue?" Yes/No?
Did that mean continue the game or continue following the link??? Apparently it meant following the link because the game ended when I clicked yes (the usual message with a game interruption means continue the game or tournament).
Oh well, I got kicked out of a useful practice session by a confusing pop-up.
Par for the course.