mediacodec

Hello, I'm using android's MediaCodec to render a movie to a texture created in Unity. I do this by attaching the texture from Unity to a framebuffer object and then rendering to it using the texture drawn to by android SurfaceTexture. The movie was rendering fine until I switched to Development build and then switched back to Production. Now, the image from SurfaceTexture only shows up when I use Development build.
What changes in terms of OpenGL when I switch to development build? Or am I messing up the gl context somehow?
Below is the native code I call every frame where I think has the highest probability of having errors.

    public void DrawFrame() {
 
        synchronized(this) {
            if (updateSurface) {
                //GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
                mSurfaceTexture.updateTexImage();
 
                mSurfaceTexture.getTransformMatrix(mSTMatrix);
                updateSurface = false;
 
                Log.d(TAG, "Update texture");
 
            } else {
                return; //no need to render texture
            }
        }
        //mDecoderAct.onDrawFrame();
 
        //bind fbo
        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, mFBO);
 
        //GLES20.glEnable(GLES20.GL_BLEND);
        //GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
        GLES20.glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
        GLES20.glClear( GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);
 
        GLES20.glUseProgram(mProgram);
        checkGlError("glUseProgram");
 
        //texture
        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
        GLES20.glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTexExtOES); //no need to bind, updateTexImage does that. do it anyway 
        GLES20.glUniform1i(mExtSamplerHandle, 0); //make sure the sampler is bound to the right texture unit
        //GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureID);
 
        //position
        mVertices.position(VERTICES_DATA_POS_OFFSET);
        GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false,
                VERTICES_DATA_STRIDE_BYTES, mVertices);
        checkGlError("glVertexAttribPointer maPosition");
        GLES20.glEnableVertexAttribArray(maPositionHandle);
        checkGlError("glEnableVertexAttribArray maPositionHandle");
 
        //uv
        mVertices.position(VERTICES_DATA_UV_OFFSET); //point to first uv
        GLES20.glVertexAttribPointer(maTextureHandle, 3, GLES20.GL_FLOAT, false,
                VERTICES_DATA_STRIDE_BYTES, mVertices);
        checkGlError("glVertexAttribPointer maTextureHandle");
        GLES20.glEnableVertexAttribArray(maTextureHandle);
        checkGlError("glEnableVertexAttribArray maTextureHandle");
 
        //Combine the projection and camera view matrices
        Matrix.multiplyMM(mMVPMatrix, 0, mVMatrix, 0, mMMatrix, 0);
        Matrix.multiplyMM(mMVPMatrix, 0, mProjMatrix, 0, mMVPMatrix, 0);
 
        //Apply the combined projection and camera view transformations
        GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, mMVPMatrix, 0);
        GLES20.glUniformMatrix4fv(muSTMatrixHandle, 1, false, mSTMatrix, 0);
 
        GLES20.glViewport(0, 0, mWidth, mHeight);
 
        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
        checkGlError("glDrawArrays");
 
        //default
        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
 
    }

Some notes: mFBO is the framebuffer I render the external texture from SurfaceTexture (mTexExtOES). I've attached the texture from Unity to it and changing the clear color reflects in unity so I know the texture is being rendered to.