Ipfire SFP GPON Fibertwist connection issues

Do we have same issue?
(I also bypass the Genexis G2410)

Don’t you think your ISP is using MAC address, as mine is ?
Are you sure you have the correct bidi’s ? (I use 1310/1550)

1000BASE-BX BiDi SFP 1310nm-TX/1550nm-RX
1000BASE-BX BiDi SFP 1310nm-TX/1490nm-RX
1000BASE-BX BiDi SFP 1490nm-TX/1310nm-RX
1000BASE-BX BiDi SFP 1490nm-TX/1550nm-RX

Also, are you sure you don’t have IP V6?
I think IPFire may, or may not work with IP V6