First Time Collision Hitch

Hi I have a wired problem with unity
I have two object both have circle collider trigger enabled, they collide with each other. when I run the project in my mobile device there is a little hitch when first time collision happen between them I can’t understand why its happening.
please give me any suggestion that may solve the issue

I have attached two object inspector component image

here is the second one

I have solved the problem it was a print() statement inside update so that the hitch happening .