Tried searching for this but haven't found anything. One of my two ergo Pro boards is starting to have serious issues missing keystrokes in certain areas. The board is not dirty or anything and sometimes unplugging-re-plugging the USB resolves the issue (for a while). It's the upper right area, specifically 6 7 8 9 0 - = and the function keys above this. Mac OSX 10.10.5 currently, but I have the same issues if I plug the board into other machines.
I've reached out to support and waiting to hear back from them, but I wanted to check in to see if anyone else was having similar issues or not.