All system updates rewrite boot0, which is where AutoRCM is installed, because its firmware-specific so if you have AutoRCM installed and perform an online system update, AutoRCM will be removed. This is why it has always been recommended to update with ChoiDujourNX.
On a related note, you will also lose exFAT support if you updated officially since that is also firmware-specific and needs to be reinstalled either online by inserting an exFAT formatted SD card or with ChoiDujourNX.
I keep reading rumors about this
Is it true or not?
That's what I've been doing and my fuse count is still at 5 even on firmware 6.1So,
So, just always update using ChoiDojourNX and you will not have any of those issues? Lol