OK, we seem to be experiencing some issues with Google cancelling a few orders. Not everyone, but some. If you are someone experiencing this issue, we apologise.
From our end, Google itself is cancelling the order, for no given reason. They send us an email, saying that someone has cancelled an order, which then says that Google cancelled it. No reason whatsoever.
So yeah, it seems to be entirely Googles fault. We apologise for any inconvenience, and will be looking at alternative places to distribute Train Driver. We will update when we have found one (or more)