To reproduce:
1. Open the attached project;
2. Open "New Scene";
3. Make sure Graphics API is set to Metal;
4. Build and run the scene on iOS devices.

Results: The scene is rendered incorrectly, seems like only 1 quad is rendered

Reproduced with VFX Graph package versions: 6.7.1, 7.0.0
Reproduced with Unity versions: 2019.2.0b4, 2019.3.0a3, 2019.3.0a4

Devices under testing:
Reproduced on:
VLNQA00161, iPad Mini 4, A8, 11.4.1
VLNQA00199, iPhone SE, A9, 10.0.1
HELA0167, iPad 10’’, A10, 11.4.1
VLNQA00162, iPad Pro 10.5’’, A10X, 11.3
189, iPhone SE, A9, 11.4.1
500, iPhone 6, A8, 10.2

Not reproduced on:
VLNQA00245, iPhone 6 Plus, A8, 12.0.1
VLNQA00157, iPhone X, A11, 12.2
258, iPhone XS Max, A12, 12.3