Sneaky Buying Bug (SBB)
If you take the train somewhat frequently in Switzerland, you should have a half-fare travelcard which gives you a 50% rebate on ticket prices. On nationwide travels at least. I have previously noticed this on the swiss railways’ ticket vending machines: the order of the button rows for regular and half price fares are inverted between local and national transit. I thought to myself that this surely isn’t a bug, but is intended to trap people.
And sure enough, last week I accidentally bought a full price ticket for a local destination.