A10SOC customer board hangs immediately after loading *rbf in uboot

hello expert,

on our customer A10SOC board, uboot runs firstly w/ SDCard boot mode. After u-boot launch, it will READ FPGA *.rbf File from SDcard, then load it into A10 FPGA fabric. But we see board (SOC console) hangs immediately once the rbf file is loaded , and mesage as below:

"

U-Boot 2014.10 (Sep 17 2020 - 18:02:02)

CPU : SOCFPGA Arria 10 Platform
BOARD : SOCFPGA Arria 10 Kit
I2C: ready
DRAM: WARNING: Caches not enabled
SOCFPGA DWMMC: 0
FPGA: writing adrv9009_a10soc.rbf ...
Full Config?

"

My question is : (1) does this mean FPGA had beed re-configured successfully ?

(2) Is that possible FPGA can break SOC side ? Why?

(3) My undrstandng is : FPGA must be re-configed firstly, then SOC DDR4 is able to be initiazied. Is it possbile the SOC DDR can be used, w/o FPGA fabric runs up ?

I'm a bit new to SOC world, thus please give more expert advices. Thanks lot !!!