The state of SEO & EmberJS

I just wanted to ask if you had any troubles with prerender.io and ember’s loading routes?

we are using prerender.io since a long time and until recently we had no trouble, but just recently we added a global loading route to our app and since then every page that takes a bit longer to render just returns the loading route data from prerender.

It seems increasing time out for prerender does not have an effect and some how the loading route triggers end of rendering for prerender service. Any idea how this can be fixed?