Thanks for the reply!
The issues are partly the same as those mentioned by , but I don’t see any solution to “Get Moon Rotation” not working correctly, nor to “Set Sun Rotation” and “Set Moon Rotation” not working at all. The file I linked above is a clean new project with a new TrueSkySequenceAsset, so it’s probably not an with my setup. Yet the “Set … Rotation” blueprint functions do nothing at all.
As for the inverted: Unfortunately, it’s still a problem for my existing SequenceAssets. New assets don’t seem to be affected though, so I’ll see if I can transfer my settings to a new Sequence.