F-Tile Ethernet Hard IP (100G)

We are using the "F-Tile Ethernet Hard IP" (rev 15.0.0) in 100GE-4 + FEC mode in an Agilex 7 since >1 year, and it has worked fine when we build it with Quartus 24.2, but now after upgrading to Quartus 25.3.1 (patch 1.02) our 100G Ethernet switch no longer gets a link to the FPGA.

I have re-generated the"F-Tile Ethernet Hard IP" (rev 20.1.0) in Q25.3.1 with exactly the same settings (not using 'Advanced mode') as we had when generating it in Q24.2

One difference I see in the *.ip files is this:
rev 15.0.0: CUSTOM_RATE_GUI 25.78125
rev 20.1.0: CUSTOM_RATE_GUI 10.3125

These settings are not visible when not running 'Advanced mode'

Is there anyone else that has seen problems with this IP after upgrading to Q25.3.1?

A side note, we are also using the IP in 400GE-4 mode, and that works fine both in Q24.2 and Q25.3.1