Sounds like my issue is the stock window bosses that everyone has been talking about for a while. I just didn’t pay any attention. Fortunately, mine haven’t broken yet, but I went ahead and ordered the replacements from DSE.
I’ve been dealing with this for a month or so and finally decided to do something about it. Pulled the door panel off and this little bolt at the bottom of the window had just about worked itself out. Tightened it back down and no more rattle.