The IPFire worked perfectly with the NanoPi R1S and it would be good to know if it would work with this new model that seems to me a low-machine killer.
I’ve had unreliable shutdown with Nano Pi R1. A clean shutdown, from CLI or GUI, until the red power LED extinguishes, usually corrupts the bootloader and boot partition, whether on SD or eMMC. Those usually survive a reboot.
Yours seems to be handling the processing load well, although memory is a bit challenged.
You might not have had a need to power it down. I’ve done so several times to take it to computer groups, change between test & released versions as well as relocate it at home. Each time has been a disaster, with it failing to boot and needing reinstallation of bootloader & /boot partition. I can fsck /boot, but all that does is delete orphan stuff and I don’t trust the result.