do influenced/special map drops from Atlas Bosses replace normal T16 map drops?

Hi,

I have a question about the current Atlas Boss map drop logic.

As far as I understand it, Atlas bosses can have a base chance to drop special maps such as:

Shaper Guardian Maps

Elder Guardian Maps

Conqueror Maps

Synthesised / Synthesis Maps

My question is about how the game actually decides when one of these maps drops.

More specifically:
When an Atlas Boss dies, does the game first roll a “map drop”, and then go through some internal priority or check order for possible outcomes, such as:

Shaper -> Elder -> Conqueror -> Synthesised -> normal T16 -> normal T15 -> etc.

If the system works like that, then increasing the chance for influenced/special maps could potentially make me get fewer normal T16 maps, because the earlier special-map checks would succeed before the normal T16 map roll is reached.

So the core question is:

Do Guardian / Conqueror / Synthesised map drop chances replace or consume normal map drops, or are they rolled independently as separate bonus drops?

Thanks.