Inconsistent results between editor and device, logs are empty

Hi,

I create a shader that works and runs fine in editor.
However, when I build to android, it looks wrong. It doesn't switch to another shader because I see some of the effect of the shader, but its wrong.
It feels like I'm passing an instruction limit (when I look at the compiled code I see

Stats: 288 math, 9 textures, 17 branches
)

During runtime, the adb logs say nothing. Where else can I look? Is there a documented limit for GLES2 shaders? I cannot find it.

Thanks!