See, I did see that leak, but if that’s true it really doesn’t make sense.
Firstly, from logics perspective, since when do you throw a mine? It also refers to being “anchored”
And secondly, from a game play perspective, why throw a concussion or disorientating mine for it to detonate mid-air on proximity when you can throw and Nitro and… Kill them. This would also make Echo much less useful. You can set up a Mira Window with holes at the top of a soft adjacent wall and toss out these “mines” as nitros or smoke cannisters commonly are.