I'm dealing with the exact same problem with two different switches and multiple SD cards. I format using windows/linux. Fat32 both partitions. My partition that holds all my atmoshere files first, then a 30gb partition after. Updated hetake and atmosphere. I've tried every single combo and version of atmosphere, hetake, fusee primary. The only thing that works is fusee secondary and syscfw. I'm going crazy. I've done every single piece of advice on the internet. I've done about 40 switches and they all worked perfectly. The last two are not booting past the same screen that you're stuck on. One is on 9.2.0 and the other is on 9.1.0. This is ridiculous beyond the point of absurdity.