I don't see a question mark, but I do get incomplete libraries. If a folder has 50 items in it, the P8 library might initially show 12, Click refresh, get 20. Click refresh again, get 8. Click refresh enough times and you might eventually see the item you want among the truncated list. Argh.

I will search the sea of P8 comments for posts on this topic, but it might be worthwhile to make a Sticky for answered P8 questions.