A little while back, I was trying the new INFO button on an incubator, and somehow I ended up buying the dang thing when I hit the info.
I had been battling earlier, and had been timed out of a battle. So about the same time it made me buy it, a stupid Time out message popped up.
One of the buggy issues when you get timed out of a battle, is sometimes you will get random messages afterwards that say you have been timed out of battle.
So I think this annoying combination, may or may not have attributed to me making 5000 cash go poof.
I am not even sure what was bought.