Include a pic if you have it. Heavy glass flying off vehicles could be fatal to someone.
There have been multiple recalls on those Lippert/HEHR frameless windows but not that part, yet, that I recall. There clearly is still a problem and only the NHTSA can address it.
FR will be given a copy of the complaint within a few business days for them to look into so there's no need to notify them separately but you certainly can do so.