Data for Masters Spawning in the Wild

DefinitelyNotKrippBuild

Not getting any natural spawns, daily missions work though

Char ELiquids

Have only seen natural masters a handful of times on the way to t16s.

Runecoatl

Still getting missions for map boss kills. I'm only seeing Cassia and Tane naturally spawn in maps though.

Char TotBet

only encountering metamorph and Cassia.

I saw Einhar twice.

SidyoRepeat

I don't think I ever saw a natural master this league.

At first I didn't get any master random spawn unless I activated zana and inside the map she gave me they did spawn.
I decided to test something and changed my map device from "Map Device 1"(the smaller version) to "Map Device 2"(the bigger version) and I noticed that they started to spawn.
might be just a coincidence but who knows, it might be the problem

IGN: FethsBigBrainBrands

charname: MetaphlexTrapper

I'm not playing this league but would like to add that this problem is not specific to Delirium or maps as I experienced this in Metamorph league while doing early league blood aqueduct farming for tabula.

For about 8-10 instances, I got nothing but Einhar to appear and then he stopped appearing. I continued farming and didn't get any masters to appear for about 4 hours. Afterwards, all masters started spawning again.

A week or 2 later, it happened again in maps. After a few hours of no masters, I decided to save maps and started spamming instances of Foothills while farming low lvl metamorphs. After about 30 mins of that, masters started spawning again and I went back to maps. Didn't occur again for the rest of the league.

Just thought this might help save time ruling out the bug being in the Delirium or Atlas/maps coding.

charname: Delicious_Ice_Cream

I will occasionally get Tane and Cassia, but as you said they are not considered masters. I can't remember the last time I got a master naturally off the top of my head since I started the character. The only time I even see any master is if I start up a master mission I have stored.

Char: Flameblessed

Have basically never seen Alva or Jun naturally