ADIN2111 Problem with port 2

Hello,

I am currently working on the development of a smart sensor with SPE interface.
I am using the ADIN2111 to connect the smart sensors via daisy chain.
For the firmware, I used the demo package (ADIN2111 DeviceDriver -> LWIP Example) as a basis and adapted it to my hardware.
The firmware is configured so that all telegrams addressed to the device are forwarded to the host, and all other telegrams are forwarded to port 2 (and vice versa).
Now I have the problem that I cannot get a connection via the 2nd port. I have tried this with several smart sensors.

When debugging, I notice that in adi_phy.c ...

static adi_eth_Result_e phyInit(adi_phy_Device_t *hDevice)
{
//...

/* Read IRQ status bits to clear them before enabling IRQ. */
/* Hardware errors could be asserted if for, we don't care about the contents */
/* so we just discard the read values. */
result = PHY_Read(hDevice, ADDR_CRSM_IRQ_STATUS, &val16);
if (result != ADI_ETH_SUCCESS)
{
    goto end;
}
if (val16 & ADI_PHY_CRSM_HW_ERROR)
{
    result = ADI_ETH_HW_ERROR;
    goto end;
}

//...

}

... when configuring port 2, the return value of ADDR_CRSM_IRQ_STATUS (variable val) is 0x1080 or 0x0080, which indicates an internal fatal error.
The configuration of port 1 works without any problems.

Can anyone help me with this?

Best regards,
Matt