I have a scrollview, made by panel with clip range and buttons in that scrollview. Every button has a collider, as shown in picture.

The problem is that colliders could take touches out of panel. If you'll tap or swipe in the left of panel in place where orange gizmo is drawn, collider of item0 will take touch.
I made this by looking to scrollview panel example, but in example there's no that behaviour. It seems that I forget to do something. Please, tell me what's my mistake?