Iphone Calendar showing completed "repeat" actions on dates in the past

Using the calendar on the Iphone, it is showing actions on dates in the past which are marked as completed (on mine it dates back to 29 May 2010).

I’ve noticed that the completed actions it’s displaying are ones that are “repeating” actions. Not sure whether this will help fix this bug.

Would be good to show the calendar on the Iphone as is done on the web app