We are using Retangle object, as tablet and we drop cloth in unity to top of it. And it does this everytime, whats wrong?
Edited Title
It’s really hard to tell what’s going on in your screen shot. Perhaps post a couple other views to help us understand what’s going on?
Change the thickness of cloth and its better to use a mesh that has more vertexes might help you I hope 
bigkahuna , mainly problem is that the cloth is going trought that tablet. Emadgh thanks for reply! yep that works ( adding thickness ) but then we have another problem… cloth flows on air beneath table 
SO still have same problem 
Okey i have tried almost everything. Cloth allways goes throught model!!! ( so far i have tested only with that table model…) that table have mesh collider, and green area is over the table edges so why cloth goes throught of it 