Lighting build keep saying unbuilt objects after build

Development Rendering
22

I was have same issues. event I was use dumpUnbuildLightIteractions.
something like pointlight item.

Cmd: DumpUnbuiltLightInteractions
DumpUnbuiltLightIteractions
Lights with unbuilt interactions: 25
Light PointLight86
Light PointLight88
Light PointLight120
Light PointLight121
Light PointLight122
Light PointLight123
Light PointLight124
Light PointLight125
Light PointLight126
Light PointLight127
Light PointLight128
Light PointLight129
Light PointLight130
Light PointLight131
Light PointLight132
Light PointLight133
Light PointLight134
Light PointLight135
Light PointLight136
Light PointLight137
Light PointLight138
Light PointLight139
Light PointLight140
Light PointLight141
Light PointLight101
Primitives with unbuilt interactions: 361

23

I used Add Spline Mesh Component and had this problem.
I got a hint from your post.
It was improved by unchecking Cast Shadow or changing Mobility to Stationary or Movable.
thank you.