I found a bug by accident. I was tining to escape with tracer over the abyss of Collosseo, but I had no blinks. But I did not fall down, I was kind of standing on an edge.
So its on Collosseo at the cliff side next to the Well. Between the middle and the checkpoint, on the outside.
So I tried to replicate it. And I found out that on one side of the map, only one side, it is possibile to “stand” on an edge. It´s not really standing, more like gliding, almost falling off.