I was playing, as Mei, Petra deathmatch on August 6th 12:40 AM.
When I encountered enemy Moira at a hallway while on low health, I immediately put up a wall and ice blocked.
Then the Moira’s damage orb casually passes through the wall.
(I died after several seconds)
I looked up on google about this issue, and apparently this has existed since November 30, 2017.
So why hasn’t this game-breaking bug been fixed for 9 months?
More detail: Seemed like the Orb might have passed through between the two “pillars” of the Ice Wall.