Sketchup mobile viewer issue, models have no colour?

Hi

I’m using the sketchup mobile viewer for ipad, when I open any model it opens without colour and at times with random models missing. On the home page however the models are as they should be, its only when I open the specific model that this happens.

Can anyone advise me on this?

Any help would be much appreciated

Does this problem persist? If so, are you running 1.3 SketchUp Viewer and latest iOS?