This may be just a new manifestation of the same issue, but lately I've noticed opened Explorer windows frequently flashing, which is usually a sign that one is trying to find its way into the foreground.
Also, it's now not unusual that while I'm in one opened Explorer window renaming a file, another opened Explorer window will start flashing and suddenly take its place, negating the file renaming in the previous Explorer window.
Problem appears to be only getting worse. :(