You're using UI camera as your normal, platform camera, you're moving it, making it follow the player, etc.
Now:
-If your panel isn't a child of your UICamera, then when you move it, make it follow the player, etc your panel and widgets will go out of the camera's range, so it won't detect them.
-else if it is a child to your UICamera, then moving the camera around should also move the whole UI underneath the camera (the panel and the widgets) - You didn't mention that, so I guess that's not the case here.
Anyway, make sure you have a standard UI hierarchy, like:
Root
Camera
Anchor
Panel
And then, use a separate normal (doesn't have a UICamera script) camera for your platformer purposes, move that around, follow the player, etc and leave your UICamera intact.
PS: There's a 'Debug' checkbox in UICamera, tick it, it gives you feedback on what collider the camera's ray is hitting, very helpful.
Let me know how it goes.