Override Sorting disables Blocks Raycasts

I have similar problem. If I add Canvas component on gameobject, it just start to ignore all mouse (touch) event, even though Canvas component is disabled from the beginning of the scene load. Is this caused by Unity bug? Or do I need to know more about overring in Canvas component? Please help me if you know anything about this problem.

Thanks!

$$anonymous$$y issue was related to the sorting of draggable objects. To solve this, in my drag handler script, I created a startparent variable to remember the original parent (startParent = transform.parent;) of the object select to drag, then when I drag the object, I parent it to the canvas directly. This places it at the top layer for sorting within the canvas. When I end the drag and drop it in its new slot, I parent it back to it's startparent. The game object being dragged does have a canvas group associated with it, but I have all the desired functionality that I want. I never had an issue with touch events being ignored as $$anonymous$$e was more of a sorting issue.

I see. Unfortunately, I cannot solve my problem by your solution. I need both overriding sorting layer by Canvas component and consumption of mouse click (touch) event - meaning block raycast. Ty for your reply.