Please try to figure out what has customer tried on their board.
If this is caused by update, then this issue should be gone if they re-flash the board again with the driver package that you provided. And again, they shall hit this issue again when they run the update.
Also, what kind of update is that? apt-get upgrade ?
And please stop sharing me some partial usb dts. This really does not help. If you want others to help analyze, you shall share the finalized dts and the full log.