Aha! I figured out why
sometimes the Auto-Win doesn't work.
It has to do with the
Daily Reset.
When I tried using the Auto-Win on the
Daily Mission, it hanged and no enemies spawned.
When you
untoggle it though, the first wave spawns, but then no more units spawn after that.
You are forced to quit out of the mission. Why? Because when you farm a Daily Mission once the
daily reset hits, you have the chance to
not spend
EN for one Daily Mission per day!
The Auto-Win is
tied to the amount of
EN spent!
Therefore, if
no amount of
EN is spent, the Auto-Win
bugs out and does not work.
However, when a required amount of
EN is needed for a mission, the Auto-Win works properly!
So, it does not depend on whether or not your have a Relief Gunpla for missions, but it's the
EN that matters!
As for Multi-Missions and Crew Missions, I tested the Auto-Win on the Satan Gundam event, but it looks like the
loading screen hangs when it's turned on. As for Crew Missions, well, I'm not in a Crew yet, so I can't test that out.
I hope this helps with other players who are questioning why the Auto-Win sometimes bugs out.