Steps to reproduce:

1) Download attached project and open in Unity
2) Make sure Graphics API is set to Vulkan
3) Build and Run _Complete-Game scene on a device
4) Press and hold on the mobile screen (this will trigger shooting effect)
Note: Screen will be black while touched

Reproduced with:
2019.1.0b3, 2019.2.0a6
LWRP package version: 5.3.1

Devices under testing:
Reproduced with:
VLNQA00218 Samsung Galaxy Note9, GPU: Adreno 630, OS: 8.1.0
VLNQA00222 Google Pixel 2XL, GPU: Adreno 540, OS: 9.0
VLNQA00013 Samsung Galaxy S6 Edge+, GPU: Mali-T760, OS: 7.0

Not reproduced with:
VLNQA00129 Nvidia Shield, GPU: NVIDIA Tegra, OS: 7.0
VLNQA00220 Samsung Galaxy Note9, GPU: Mali-G72, OS: 8.1.0