Question Button can be highlighted but can not be pressed.

My project has a weird problem. I've been searching for hours, but there is only solution for "button won't work". In my case, those are able to be highlighted while mouse is over but nothing happen when I clicked even with just simple print(" "), and the color has not been changed to "pressed" too. The buttons work perfectly in other scenes. Does anyone have any suggest? Thank you for attention.

 

Sorry, I found the cause of that. It's in the new input system. When I click on the button, my left mouse is doing its job in controlling too. I'm trying to solve this. But always appreciate any help. Thanks for your attention!