My test result is, only with AoA, pixons can spawn in Precasia.
But if I installed a mod which has biomes with tag "c:is_dead" (for example, Terralith), there are no pixons in Precasia.
That's my surmise about this:
T1~T4 spawners also have "#c:is_dead" as "biomes" like T0, but these spawners are in whitelist mode, not blacklist.
As a result, if player install some mods including biomes with tag "c:is_dead", pixons will only spawn in such biomes. Precasia has no such biomes, so there are no pixons in Precasia.
My test result is, only with AoA, pixons can spawn in Precasia. But if I installed a mod which has biomes with tag "c:is_dead" (for example, Terralith), there are no pixons in Precasia.
That's my surmise about this:
T1~T4 spawners also have "#c:is_dead" as "biomes" like T0, but these spawners are in whitelist mode, not blacklist. As a result, if player install some mods including biomes with tag "c:is_dead", pixons will only spawn in such biomes. Precasia has no such biomes, so there are no pixons in Precasia.