Apologies if this is a duplicate - I couldn't find a recent thread documenting this anywhere. I am running 1.1 w/ Royalty (and other mods).
An eclipse occurred during a toxic fallout. Immediately after the eclipse began, the green toxic fallout hue disappeared. I was expecting the hue to remain green during the eclipse. The toxic fallout game condition remained as expected.
Save and logs available on request, but this should be pretty easy to replicate.