FAS1 suddenly fails flashing to FlashAdvance 256M after working multiple times

[Zizouomar]

Hi everyone,
Got an ancient Flash Advance 256M from marketplace for very cheap and been thinkering with different softwares to explore what was out there at that time.
Discovered the FAS1 way with AKAIO on an AceKard and been working flawlessly the whole evening. Tried multiple ROMs at the same time with PogoShell, also flashed Mother3 alone (since it covers the full 32MB).
However, after a few hours, the card stopped accepting new flashes. I keep getting a "Failed to erase flash at 0x08000000"
I tried different FAS1 builds, different ROMs to flash, different PogoShell compilations, nothing. I just can't flash anything on the Flash Advance anymore.

Any ideas ?

Thanks!