Canada barely has any peacekeepers at all so why is it hosting a major peacekeeping summit? Politics and brand image made even more crass by the ongoing fiasco in trying to find a peace keeping mission to its liking.
Based on the current Canadian deployment, 3% of its peacekeepers have been involved in sex crimes. 
"The third incident is also from 2015 and still under investigation." is ridiculous and is nothing more than a get out of jail card.