did you flashed using modified boot and recovery? also in my experience you have to wait for modifoed boot&recovery every time you want to update sfos to next version excluding minor ones (3.3.0.14 -> 3.3.1.x should flash new files, 3.3.0.14 -> 3.3.0.x can upgrade via UI)
fastboot flash aboot emmc_appsboot.mbn fastboot reboot-bootloader sleep 10 fastboot flash modem NON-HLOS.bin fastboot flash persist persist.img fastboot flash rpm rpm.mbn fastboot flash sbl1 sbl1.mbn fastboot flash sbl2 sbl2.mbn fastboot flash sbl3 sbl3.mbn fastboot flash tz tz.mbn fastboot flash boot boot.ext4.img fastboot flash recovery recovery.ext4.img fastboot flash sailfish sailfish.img001 fastboot flash sailfish sailfish.img002 fastboot reboot