The Match History in the client lists "Summoner's Rift" as the map regardless of where the actual game was played (e.g. Twisted Treeline, Howling Abyss). There's a few games in my History that show Poro-Snax or Sweeper as my trinket, neither of which are available on Summoner's Rift. The detailed game page displays the correct map though.
1. Play a non-SR game.
2. Go to the Profile -> Match History tab in the client.
3. Check the map name shown.
All of the 10 non-SR games currently in my Match History incorrectly list "Summoner's Rift" as the map.