@Meddler Not sure if Bug or Intended: Darius Passive ticks every 1.25 secs instead of every 1

From the League of Legends Wiki:

https://pbs.twimg.com/media/CI8gtdwUsAAtPS5.png:large

This causes his passive to deal damage at 1.25/2.5/3.75/5, effectively making it so 2 ticks happen at 5 seconds

It's supposed to deal damage every second according to the tooltip

Is this intended or not Meddler/Riot? This feels like it should be a "bug" but I'm not sure