I noticed that as of the beginning of this week, board previews in my Home screen show up blank or all copy the same board position if the page has been open for more than a couple of minutes. Reloading the browser page refreshes them to the current board position, but they go blank (no stones, lines, or numbers on the side of the board) within a few minutes.
Example:
Is this a bug in the site, or something with my browser? I currently have Chrome Version 49.0.2623.87 (64-bit), which is the latest as of writing this.