Arria 10 Transceiver rx_cal_busy always HIGH for 24s after programming

Troubleshooting 10G link native, the external TX is always ON. USRCLK 100MHz always ON.

Every time the FPGA is loaded through JTAG or cold boot, there is a 24sec something wait until rx_clk_busy goes to LOW then the link starts functioning normal.

According to Google AI, transceiver calibration module seems got stuck, and unfrozen by hardware watchdog to prevent brick.

We has a different product that establishes link almost immediately with the same transmitter.

Please suggest, thanks