Sysupgrade problem with rb 921

Hi there
Again problem with rb921 :disappointed_relieved:
After install ram image for 921 (mikrotik netmetal triple) i cant install it to nand large after use
sysupgrade -F devic reboot and go back to routeros
I try ar71xx targets and ath79 targets (custom build)
I try use mtd but same problem , i disable all /etc/init.d services but same .

Any idea ?

any idea ?