Meshes not getting batched when GPU instancing is enabled

Steps to Repro:

1. Open attached project
2. Build and run on an Android Device
3. Unity > Window > Frame Debugger
4. Enable GPU Instancing > Observe in frame debugger that multiple draw calls are being generated

Expected Result:
Meshes should get batched in single draw call

Note:
1. Occurring with Vulkan and OpenGL3 graphics API
2. Also, note that sometimes when meshes are getting batched some of them are not getting rendered, please refer to attached screenshot
(Occurred with OnePlus3 Android 8.0 GPU Adreno530 API OpenGL3)

Environment:
Built with Windows & Mac

Occurring With:
2018.1.0b3, 2018.1.0b2, 2018.1.0a5, 2017.3.0p2, 2017.3.0f3, 2017.3.0f1, 2017.2.1p2, 2017.1.3f1

Devices Under Test:
Not working on:
1) OnePlus3
Android: 8.0.0
GPU: Adreno530

2) LGNexus4
Android: 5.1.1
GPU: Adreno 320

3) LG Nexus5
Android: 6.0.1
GPU: Adreno 330

4) ASUS Memo Pad
Android: 5.0.1 IMG
GPU: PowerVR Series 6 - G6430

5) Samsung Note 2
Android: 4.4.2
GPU: Mali-400MP4

6) Samsung Galaxy S6
Android: 7.0.0
GPU: Mali-T760MP8

Working as expected:
1) Nexus9
Android:7.1.1
GPU: Kepler DX1(Tegra)