I'm currently on 19.07.03, trying to upgrade to 19.07.05. I've tried flashing via luci probably six times now, both with and without saving settings. I've also tried logging in via SSH and using sysupgrade -v with no luck. Last I tried using sysupgrade -i and when prompted to save settings I selected no. Each time, it appears flashing starts working, only to see that it's still on version .03 after reboot.
root@HomeRouter:~# cat /etc/openwrt_release DISTRIB_ID='OpenWrt' DISTRIB_RELEASE='19.07.3' DISTRIB_REVISION='r11063-85e04e9f46' DISTRIB_TARGET='bcm53xx/generic' DISTRIB_ARCH='arm_cortex-a9' DISTRIB_DESCRIPTION='OpenWrt 19.07.3 r11063-85e04e9f46' DISTRIB_TAINTS=''