Elder Guardians Don't drop guardian maps

i made like ~40 elder guard's in the last 2 days and notice that i don't get guardian/ conqueror maps.(all skilled for more drops)

i now tested it with sextant that forces a Shaper guard map to drop and nothing

i don't have singular focus or Shadow shaping but i have Inevitable Ambush.

any other mistake i don't see or a bug?


edit: made something more clear

Singular focus turns shaper guardian maps into transmute orbs everytime as they are not on the atlas. If the elder guardian maps dont roll a favorite they get turned into transmute orbs as well.