[2019.3.0b11] No GraphicRaycast interaction while using Canvas Camera Mode & World Canvas

Hi Unity,

I found a bug on 2019.3.0b11. Recently I'm using 2019.3.0b8 and using canvas render mode of Screen Space - Camera for my games. After I've update to 2019.3.0b11, I can't interact any UI in the game.

I found that if I'm using Screen Space - Overlay, it's able to interact normally.

How to reproduce,

1. Create new fresh Unity Project.
2. Create new scene.
3. Add UI Canvas (and Events System)
4. Change canvas render mode into Screen Space - Camera or World Space.
5. Create a simple button.
6. Add an event to a button.
   (I've just add a GameObject.SetActive(false) event for testing interaction)
7. Play and try press the button.

Currently I'm revert to use achieved version (2019.3.0b10) just for workaround.
Bests,