Hi LironAvrhmov
In practice the handoff file should be unique to each boards and be compile together with the uboot for each boards.
If you are sharing the binaries, please avoid that and use the handoff file from each project to compile separate SPL and uboot for the boards.
One thing to try is to check the QSPI Clock enable register and the QSPI Reset register below:
https://www.intel.com/content/www/us/en/programmable/hps/arria-10/hps.html#topic/sfo1429890551172.html
https://www.intel.com/content/www/us/en/programmable/hps/arria-10/hps.html#topic/sfo1429890575955.html
On the failing board try reading the register value and see if the QSPI Clock is enabled and not in reset.
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