Bug/cheat Reaper ult before game start

Ilios, before start Reaper used ult.

It’s a bug that has been around since like the beginning of the games launch.
I believe it’s reaper exclusive. If you wraith form in the spot near the cockpit that force resets you to the spawn starting point while holding Q you’ll use your ultimate regardless of ultimate charge. There’s no benefit from it since he spawns so far back.
It’s reproducible on any of the maps with the KOTH ship. Have fun with a bug that’s impact is on the fun side of an easter egg.

Its not reaper exclusive actually. I’ve tried it with a few extra heroes, and turns out you can do it 1) without wraith form, and 2) most any hero that is the same size as or smaller than reaper. Such as tracer or pharah I’ve confirmed work. There are still heroes that it doesn’t work for though like lucio

Does it work for heroes that can benefit from it though? Any transformation (Mercy, Genji), Doomfist, Ashe or Junkrat?