No OpenGL Context in Unity above 2017.1.2f1

Hi!

I am working on Android plugin which should load textures natively in OpenGL from Java code. I know that whole this OpenGL context thing is tricky. This is Java code:

  public static int Load(byte[] textureData)
     {
         final int[] textureHandle = new int[1];
 
         GLES30.glGenTextures(1, textureHandle, 0);
 
             if (textureHandle[0] != 0)
             {
                 final BitmapFactory.Options options = new BitmapFactory.Options();
                 options.inScaled = false;   // No pre-scaling
 
                 // Read in the resource
             final Bitmap bitmap =  BitmapFactory.decodeByteArray(textureData, 0, textureData.length, options);
 
             // Bind to the texture in OpenGL
             GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, textureHandle[0]);
 
             // Set filtering
             GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_NEAREST);
             GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_NEAREST);
 
             // Load the bitmap into the bound texture.
             GLUtils.texImage2D(GLES30.GL_TEXTURE_2D, 0, bitmap, 0);
 
             // Recycle the bitmap, since its data has been loaded into OpenGL.
             bitmap.recycle();
         }
 
         if (textureHandle[0] == 0)
         {
             throw new RuntimeException("Error loading texture.");
         }
 
         return textureHandle[0];
     }

If it's called from e.g button onclick event it will throw an exception :

call to OpenGL ES API with no current context (logged once per thread)

After some googling I found a way to fix that. When calling my Java code from MonoBehaviour.OnRenderObject it works perfectly fine. Texture is being loaded, everyone is happy. I made such sample program in Unity 2017.1.2f1

Then, when I updated to 2017.2.0f3 it throws

call to OpenGL ES API with no current context (logged once per thread)

again, even though I haven't made any changes and Java code is still called from MonoBehaviour.OnRenderObject . I tried to update to 2017.3 beta but it also throws an exception... Any ideas what changed? I'm kind of blocked now. I found no information about changes that might cause that in release notes.