excessively slow splash screen on unity android

Hello, we're working on a project for android using unity 5.2.0

we're running into the problem that the unity splash screen shows up for around 45 seconds on our samsung galaxy tab testing device while it's loading our initial scene, which is essentially an empty scene with a script to load the actual main scene and 2 texture2d splash screens

according to adb,exe there's a shader that fails to compile, (TexCubeLodEXT), but that doesn't appear to exist in our project and the rest of the time (for the most part) there's no output being produced other than the occasional accelerometer update

if anyone could provide some insight as to why this is so extremely slow that could help us a lot

Cheers Tycho