Step:
1. Open repro project. Inside the repro scene, there are shaders which are having #pragma target lines.
2. Build to Android phone or use the apks in the project

Expected Result: All spheres look the same (textured surface shader sphere) and are not pink
Actual Result: The target 4.0, 4.6 and 5.0 ones are pink. Others are correctly renderered.

Please see the picture in comment.

Note: The supported shader model on testing Android device is 50

Reproducible with: 2017.2.0a4, 2017.2.0b1, 2017.2.0b2, 2017.2.0b3, 2017.2.0b4
Not reproducible with: 2017.2.0a3, 2017.2.0a1, 5.6.2p1
Device: Samsung Galaxy S7, Nexus 6