In the current latest 1.15 version of the mod not all the rituals are working. The following constellation crystals won't work when on pedestals:
Bootes
Armara
Octans
Mineralis

Adding onto this with ones that don't work through anchors:
Evorsio
Horologium doesnt seem to work at all
Bootes
Fornax (also causes massive frame drops)
Pelotrio doesnt seem to be working normally either, unless its effects are not very noticeable

I am unable to reproduce any of this behavior.
Both on dedicated and integrated.

So some things have crept up now that i've tested this more thorougly. So at least Evorsio and Horologium effects had an issue; i'll go through most things to add more clarifying particles and other things while i'm at it.

I indeed did find quite a couple of things... well, those will be fixed for 1.12.8.