Why are the rx_pcs_ready signal and bit[0] of the PHY_RXPCS_STATUS register (offset 0x326) not asserted for the Intel Low Latency 40- and 100-Gbps Ethernet IP cores?

Due to a problem with the Intel® Low Latency 40- and 100-Gbps Ethernet IP cores, rx_pcs_ready and bit[0] of the PHY_RXPCS_STATUS register will not assert during link training, if bit[0] of the PHY_SCLR_FRAME_ERROR register (offset 0x324) is set.

Bit[0] of the PHY_SCLR_FRAME_ERROR register should be set only when reading the PHY_FRAME_ERROR register (offset 0x323). It should be de-asserted soon after reading the PHY_FRAME_ERROR register (offset 0x323).

This is not scheduled to be fixed in any future Quartus® Prime software release.