Problem with cast shadow properties uncheck

[SPDB_19]

Hi everyone,

we have just upgrade from corona V7 to V8, and we've got some issues with objects that have cast shadows uncheck in their properties.
Shaders and shadows look broken, like a mix between 2 different renders and lighting, inverted normal...
I attached 2 different examples. On the first images, we checked the cast shadows, for the seconds, this is uncheck.
We can see the shadow of the tree in the foreground, even if it can't cast it.
For the street one, shaders and light appears really broken.
If somebody has an idea, for the moment, we will go for V7 again.
Thx for all

Seb XIX Groupe

[SPDB_19]

I just see some threads with glossy problems, but even if i convert my scene to physical mat (they are for most part of it already physical), nothing change...