Why did the collision object absorb the cloth?

[KA_HEI_NG]

Didn’t know why the cloth was not properly colliding with the collision object. What should I do?

It was supposed to have collision quality like this:

Tutorial: https://www.youtube.com/watch?v=Csy6Vd33cYI&list=LL&index=2&t=353s

Thanks!!

[RSEhlers]

Did you check your normals?

[Umut_Islam_Falah]

Can you try to deselect “single sided” option at collusion object