I have 2 Nintendo Switch - one is softModed (unpatched) and one with hwfly (latest firmware). The update for emmc (stock fw) on the unpatched worked fine -> AutoRCM OFF -> Autoboot stock -> Update without troubles.
My second switch is running now emummc with version FW 18.0.0 in Atmosphere but...
Caller -"Everytime I start a Pc game on my S24, playing on a external monitor, someone calls or texts me, n it kicks me out of the game." Customer Support - Click (hangs up)
I found it funny cause many many years ago, had a roommate in college that did this same dumbass branding of the school logo, but it didn't look anything like it after it healed. Just looked like a birthmark.