Port, board and/or hardware

Arduino OPTA

MicroPython version

I'm using Arduino Opta with MicroPython and two of them work fine. However, I ordered one online and encountered a problem after programming the firmware. Files in file explorers (Linux or Windows) are corrupted (special characters displayed and undefined files created). If I try to program it with Arduino, it seems to work fine.
I returned it to the reseller who sent me another one but it has the same problem.
Someone else have this problem ?
Thanks
Frédéric

Reproduction

try with :

ARDUINO_OPTA-20241129-v1.24.1.dfu (which works with another boards)
ARDUINO_OPTA-20250326-v1.25.0-preview.410.gdd7a950bb.dfu (which works with at least one other board)

Expected behaviour

No response

Observed behaviour

try with :

ARDUINO_OPTA-20241129-v1.24.1.dfu (which works with another boards)
ARDUINO_OPTA-20250326-v1.25.0-preview.410.gdd7a950bb.dfu (which works with at least one other board)

Additional Information

No, I've provided everything above.

Code of Conduct

Yes, I agree