Impending doom happens in PvE

[OnlineBoi (Online)]

PC/Mobile
Pc

Dimensions or Services it affects
PvE

Your in-game account name
OnlineBoi

How often it happens
Whenever you kill the Lunatic Cultist

Any screenshots or videos showing the bug

[GlasiaVD23 (Glasia)]

Happens to me as well
(the green texts mean “Impending doom approaching”)
You could do this: repeatedly beat cultist and then when green message appears, enter another boss arena. Not sure if you can lure ML to spawn doing that.