YPCFYP (Code for the Replay)
I picked Sombra on Rialto Attack. Bottom left door I went close to the outside wall in the corner of this tiny space. I was invisible as Sombra waiting for the match to start when I could hear the sound effect for when I get detected by an enemy player. I was confused until I saw the detected letters on my screen blick up for a second. As soon as the doors opened I went around the corner and found the enemy Sombra waiting invisible there. I could detect her through the wall.