Video blank with ES2 on Android Gear VR


I’m using 4.18.3.
I have a 360° video set up via media framework as a material to be used on a sphere. This works fine with OpenGL ES3.1, but if I switch to OpenGL ES2 and let the shaders recompile the material stays blank (not rendered at all in the scene). I can still hear the audio playing tho. Cheers.