Incorrect Shading of Modular Assets

Can anyone explain why this happens with my modular assets?
As you can see the shadows themselves are fine, it’s the indirect lighting of each piece
I’ve tried changing to a high light-map resolution, manual light-maps, smoothing groups, movable skylight and making the asset movable. Nothing gives me different results.
If anyone could explain this, that would be great!

Hi!

As far as I know Unreal calculates the indirect lighting by asset and not the whole scene together!
If you leave your indirect lighting smoothness “high” you will see the differences more… If you lower the indirect lighting scale to 0.1 and smoothness to 0.6 you should get rid of those!