Stationary skylight makes some objects really dark

Hi there,

I am experiencing a problem where my skylight which works perfectly fine in movable mode, creates a weird effect where some objects are super dark and while some are completely fine. The dark objects are affected by directional light but completely unaffected by stationary skylight. Do you guys have any ideas what could cause this?

I would like to add that yesterday, it was completely fine and I checked all the light maps and all are correct.

many thanks!