Hello eyelike,
Thank you for bringing this to our attention.
Is this happening with a specific Cosmos asset?
Are you storing your downloaded Cosmos assets on a network drive or locally?
Have you tried using different Cosmos Asstes?
I've tried reproducing this; however, I haven't had enough luck.
It works as expected. (see attached images)
My sample scene consists of a Cosmos asset (a green car), a simple plane (floor), a Corona Sky, and a Corona Sun.
I tried selecting the plane object and the car (Cosmos asset), but every time I tried, the result was always correct/expected.
Looking forward to hearing from you soon.