Symbols not displaying after saving and reopening file. Visual bug?

I have created a document with 8 custom symbols in the symbols pallete. I have used these 8 symbols to place 576 objects into the document of various sizes. When I first create the file all 576 objects made from the symbols appear on my screen (see image 1.jpg for an example). However when I save and close the document and then re-open it only the first 24 symbols are appearing as if Illustrator is not rendering the rest of them. Visually it looks like nothing is there unless I hover over one (see image 2.jpg). If I click and move one of the objects it will then appear visually. If I select all of the objects and select break link they will also re-appear. My question is how do I get all 576 objects to appear on my screen without having to break the links or move them? Illustrator should be rendering all of the symbols or am I missing something? Is there a way to refresh your screen?

Note I have tried opening the files on 4 different computers now and they all have the same problem, so I don't think it's hardware related. 

Thank you for any help with this.