Shape disappears when moved

I just started having this issue within the past week or so: the preview isn't rendering shapes (or paths or .ai files or images... from what I can tell) correctly - when I move the item around on the screen in the preview pane, it disappears like it's got a mask on the original position. It reappears if I zoom in/out. It also does the same disappearing act if it's animated and moving around. It renders fine, visible throughout the rendered video. But it's impossible to work this way if I can't see what I'm animating! This happens with any new file or object I create (strangely it doesn't seem to affect old objects/files, only new things I create in any file).

I've attached screenshots of the flow of issue, when trying to move the shape - shown in a fresh file. 1-draw the rectangle (notice you can't even see the blue fill color here). 2-zoom in/out and now you can see the color. 3-move the rectangle and you can see the strange hidden behavior. There are no masks, I just drew a rectangle on a new shape layer. You can see the bounding box is where i'm moving the blue rectangle, and the rectangle color is "stuck" in its original spot. (I wish I could upload a video, but it seems I can't do that here).

I'm working on a tiny 13" MacBook pro, 8gb RAM and 60gb free disk space - these are all the same specs I've been working with before this problem started happening. I recently updated my OS to the latest, as well as the latest AE CC. I've tried turning off the Fast Previews, as well as purging the memory & cache. I've tried restarting my computer and AE. I can't find any other issue like this online (partially because it's hard to describe and search for).

Hoping someone out there knows what's up! I'd love to get back to work.