Diawulf beast Videos and the "limbo" in Yugi-oh

While I write this, two videos are uploading to my youtube channel, I will put the links as soon as it finish.

Meanwhile, I always had this doubt:

Player A normal summon Sangan
Player B active Solemn warning

Sangan's effect don't active because it didn't go the field successfully. I think we all can agree with that. So, now we will go with the real doubt:

Player A set Sangan. End turn
Player B set Solemn warning. End turn
Player A flip summon Sangan
Player B active Solemn warning

In this case, Sangan's summon is negated, however it was already on the field. So, what do you think? it was on the field or not? Can player A active Sangan's effect? The answer (believe it or not) is No.

While a monster is summoned (normal, special or flip) it goes to a "limbo" state where it is not on the field or hand. And if you negate that summon, it doesn't count like it was destroyed on the field.

I ask this on Adjudication Conflagration, the judge facebook group.

So, now you know. Yugioh have a field for living monsters, a graveyard for dead monsters, and a "limbo" which is that period of time where the monster is been summoned.