devtrackers.gg
I can explain what's happening here. The indicator is drawn on the ground plane of the map and the summoning platform is several steps up so there's some weird perspective happening. However, this should only be meaningful on the summoning platform, the rest of our map has small or no offset from the ground plane. If you can find an example of this feeling off when the opponent is not on the summoning platform we can look at a fix. But for the most part it's not meaningful here since the player has the fountain buff (of course there are the rare cases where you time your ult for someone's back, etc.)
The reason why we haven't addressed this before (even on PC) is both technical and gameplay related. The "proper" way to do this is to project the aim indicator onto the ground. This is more expensive from a performance perspective and from implementation/testing time. But the main reason we haven't done it, is that it also can look pretty weird when your indicator intersects terrain, think about the draven aim indicator drawing on the stairsteps of the platform and no longer being a straight line.