I'm using the API to verify user's purchases and it works fine when the purchase is made directly to the game. But there is one user who keeps getting error during the process. After a few tests and checking on the log, I realized that the only difference is that he purchased the game on a bundle sale lately while other successful instances are all from single game purchase. 

I wonder if this is a known issue around bundle sales? Or did I miss anything? Is there any workaround for this?