Flickering Shapes in Scene

pufflehuff

I get this issue where random shapes will flicker and flash. In the image below, it's the heart-shaped charms that seem to be affected, but deleting the asset simply transfers the issue to another object. I would post system stats, but I don't even know where to start (or even if they're needed :s)

It's most present when I leave a D|S scene open and idle for a long period of time..like I'll open a scene then walk away for 5 minutes or more. Reloading the scene might help, and restarting D|S is sometimes helpful also, but the flickering always returns.  

 

Any help would be tremendously appreciated. <3