Possible (Not really but could be) bug with a mission
So this mainly depends upon your definition of "Summoners Rift"
But I have the mission "Resilience - Heart of the Champion" and the second part where you have to get 40 kills/assists on summoners rift. I have been playing Nexus Siege and have gotten well over the 40 kills/assist. I have not yet recieved any points towards the mission. (yes I know I just have to play normals) I just wanted to post it.
Technically speaking, I believe that Nexus Siege takes place on Summoners Rift. Which I should get credit for it. In the 1960-1980's even though the soviets built the berlin wall, and divided it down the middle, it was still berlin. (yes you can argue East/West Berlin, But it is still Berlin).
I am not expecting to get credit for the kills/assists but Riot you may want to add in "No Rotating Game Mode (No RGM)" Either at the top with "Match Made PvP" or just after the mission requirements.
FYI I was able to get the first part of the mission on the Nexus Siege. "Win one game with Ashe on either team"