Look at the Jett Ghost(right next to the sage that killed me) others seems not to see it(also asked my friend that i was playing with, she didnt saw anything). I thinks its gamebreaker as you can shoot to it by mistake. Check that our Jett was dead, and their Jett was fighting later with Reyna.

https://reddit.com/link/khok6g/video/d3vopwfrfl661/player