Why has my lighting changed and colors are strange?

I created a very simple VR level, as a sort of product demonstration allowing a customer to see our product in situ at their site, about a year ago. I also made a second generic type level a few months later as a sort of product demonstration, without issue.

I’ve come back to it recently to make another specific level for a customer, however when I make a new level it appears to be so much darker than the original. I’d copied all the level atmosphere assets from the original level (sky light, lightmass volume, skysphere, etc) I tried rebuilding the lighting but that didn’t really fix the issue it’s still darker than expected.

I’ve then tried duplicating the original level and it does the same thing (i.e.darker), and when I build the lighting all the colors change on the textures.

I’ve even then simply rebuilt the lighting on the original level and it too is affected with the changes.

I’m at a loss as to what’s causing this, because the project hasn’t been touched for several months.

This is what one of the textures looks like before I rebuild the lighting (as it should be)

This is what it looks like after the rebuild (lighting only)

As you can see the texture in use is not the color that is being displayed in the editor, its a megascans asset that hasn’t been edited