The time display at the tram station is not working properly. It always say "Next tram: 6 minutes", no matter how long you wait.
Then, when the tram actually starts moving, it jumps from 6 to 4 minutes, and only then it starts to work properly. But at that point, I already know the tram is coming, so no need for a display.
RIOC should fix it to always show the right time for the next tram. It shouldn't be too difficult, given they have a schedule.