Bug Report Solved Screen turns dark before bosses in some dungeons

Hello
this happened to me this week that in some dungeons, when it comes to the final battle with the boss, the screen cuts and suddenly goes black. The game continues, the audio works normally, but you can't continue because can't see because of the sudden black screen.
Specifically, it happened to me in the dungeons of Nyrol's Nest and Juno Crystal Gallery, maybe it happens in others dungeons as well.