Hi Luxxa. I FEEL YOUR PAIN. I've generally been the artist that has to go around fixing all of these any time they happen -- and they happen terribly often, especially when you're working with modular geometry. The cause of the flashing dots is, supposedly, t-junctions. (i.e. Edges that are snapped together, but where…
This is really hard to get rid of without extra geometry. Just extend the edges of your modular pieces back a little way and that should hide your gaps.