Prob has the Nicehash FIRMWARE wich was known to be "manipulated".
the Custom FW from nicehash has a backdoor were this scammers let them change your mining settings.
It was aknown issue and thats who nicehash started, they were focused on custom firmwares at the beggining rather than pool.
the Nicehash firmware backdoor can be removed by flashing to org bitmain firmwares , you need to clean the entire memory from the controller board "BBB".
flashing the board with the firmware by sd card

today i did flash the board with the card and then i try to upload the new firmware but wasnt possible.
i saw in the l3+ firmware the first in the list its described as sd recovery from 2019
should i use just instead ?