Please Support Rollback for Beelink GT1 Firmware

everal

Dear all,

i have 3 beelink gt1 devices with sn 912.
2 devices works very stable, also with external usb hdd
1 devices works very very bad, with external usb hdd over 20 times freeze in 1 hour movie-playback, freeze randomly on boot, freeze randomly on os.
the bad device is in absolut clean status with firmware 1.04. reset with factory default with app "update&backup" and after this with reset-trick through amlogic recovery.

please support for rollback...
i will try older firmwares v1.02 till 1.03, but i get a error message on amlogic recovery
"no older signed zip images" are possible to flash...

please fix this!
so i have fear to flash latest 1.04 test-firmware for rgb, i think no "rollback" to older final version is possible.

i can upload a image with detailed information for amlogic recovery what i mean, becouse "update&backup" app start "android flash" and break with a "error-message".

thx for further information how i can rollback firmware to older versions...

greetings from germany...