Currently batch three has solved the restart and reboot issue by updating both the STM32 MCU firmware and SD card firmware (they have to match each other before the miners can work). We decided to send batch one and batch two customers new STM32 MCU to replace the original ones on boards. You will have to find local expertise to execute the replacement though. And we are thinking of finding some expertise for you.
I really can't be believe that Innosilicon haven't prepared the boards with a JTAG header and they now need to replace the complete STM32 MCU. Eventually it could be possible to program the chip with a special clip, I know these exist for SOIC, like i.e.:
https://www.aliexpress.com/item/Programmer-Testing-Clip-SOP16-SOP-SOIC-16-SOIC16-DIP16-DIP-16-Pin-IC-Test-Clamp-with/32412927187.html
Haven't found such for the LQFP the STM32 seems to be in, though I think they should exist. But then again, it is unknown if the chip can be reprogrammed while mounted, maybe there is a reason they have no JTAG holes/headers.