Fake shadows Archicad-Twinmotion

Good morning everyone, I’ve been using ArchiCAD for many years and now I’d like to create renderings and videos by transferring ArchiCAD 29 models to Twinmotion 2025.2.
I use a MacBook M2 Max, which I haven’t had any problems with, and ArchiCAD also works great.
Unfortunately, I’m having a particular problem with TM: when I import my model via the Datasmith plugin and view it with TM, THE SHADOWS ARE WRONG! You see the image: it’s as if TM can’t see that the walls are touching; light is shining through them. Crazy.
I’m very worried because I have a major work deadline, and I have to decide whether to continue with TM or buy D5 or Enscape, or other similar programs.
Has anyone ever had an experience with a similar problem? I should point out that the problem doesn’t go away if I export the rendering!
Thanks everyone.