DUT (Reproduced):
Samsung Galaxy S6 edge (ARM Mali-T760MP8) (Android 5.1.1)
Samsung Galaxy Note 10.1 2014 Wifi (ARM Mali-T628 MP6) (Android 4.4.2)
Google Nexus 10 (ARM Mali-T608) (Android 5.1.1)
Xiaomi Mi Pad (Nvidia Tegra K1-32) (Android 4.4.4)
Google Nexus 9 (Nvidia Tegra K1-64) (Android 6.0)

DUT (Not reproduced):
Google Nexus 6 (Adreno 420) (Android 6.0)
Google Nexus 5 (Adreno 330) (Android 6.0)
Samsung Galaxy S5 (Adreno 330) (Android 5.0)

To reproduce:
1) Create new project
2) Make sure there's no skybox selected for better visibility of issue (it will render whole screen pink if default skybox is in project)
3) Add a couple of objects (primitives like cube work) and give them materials with different shaders (tested: legacy/diffuse, standard, skybox/procedural)
4) Change platform to Android
5) Make sure it forces OpenGLES 3
6) Build and run on ARM or Tegra device supporting it

Expected: Objects are rendered normally
Actual: All of them are rendered in pink

Reproduced in 5.4.0a3, 5.4.0a4
Not reproduced in 5.4.0a2

Note: Not reproducible in OpenGLES2