Scrollview's disappear in World Space Canvas's in Build 20

I just read this thread as I was about to post this:

http://forum.unity3d.com/threads/build-20-scrollview-bug-on-low-end-android-devices.272611/

But this claims it's on android devices, my bug appears in all modes (PC/Mac, iOS, Android, etc) where I have a world space canvas with a scroll rect. When I create a scroll rect (w/ image and mask) in a screen space overlay canvas, everything is fine. When it goes into the world space canvas, it disappears the moment i rotate it, never to return.

I've submitted my code in 640246 if you'd like to look at it.

 

+1, I'm seeing the same. It seems to be rendering the image of the scroll rect parent above the contents. See the screenshots below. The only thing I did between them is Add Component -> Mask. This is on Beta 20 on a PC build. It only seems to happen on certain rotations of world objects, oddly. I have this same prefab in a few places and it works in some orientations and doesn't on others. Rotation of this Canvas is x 45, y 90.This worked in Beta 17 (I just upgraded).

No Mask:


With Mask:

 

Any solutions for this?

I've tried a lot of combinations and I can't make it work.

 

I found the same problem in 4.6.20. After spending two hours trying to get it to work, I upgraded to 4.6.21, and that problem disappeared.

 

I just downloaded the RC 4.6.0f1.

The issue remains the same.

 

RC 4.6.0f2: The issue remains the same.

EDIT: It only happens with World Space canvas and Deferred Lighting camera.

 

The problem was fixed in 4.6.0f3.

 

It persists to this day, even in Unity 5.2.2p3.

 

I am seeing the same issue this day, in Unity 2020.3.6f1, 7 years later
Fun times...