ColinTaylor
Part of the Furniture
Sorry, no idea. There have been a been a few reports of the same sort of crash (link) but the cause was never identified AFAIK.Any idea what might have caused that? Merlin flash could address that. Perhaps the stock firmware update failed fully? Doubtful.
I doubt flashing Merlin's firmware will make a difference in itself as the core code is the same as Asus'. You could try disabling all of the AiProtection functions to see if that makes a difference as that has been known to have issues in the past. Maybe try experimenting with going back to an older firmware version in case it's a bug that crept into the current release.