I am experiencing the same issue, but on FW 13 Intel Core Ultra: AMD Framework 13 required multiple boot attempts before actually booting - #10 by James3 (see my replies in that topic).
I am already in contact with support and it seems to be related to the system memory i’m using, which i supplied myself. This the memory i’m using:
Kingston FURY Impact - DDR5 - kit - 32 GB: 2 x 16 GB - SO-DIMM 262-pin - 5600 MHz / PC5-44800 - CL40 - 1.1 V - unbuffered - on-die ECC
With 1 stick there’s no issue (doesn’t matter which stick). 2 sticks and i repeatedly have the issue. If i mix 1 stick with another test stick (4800 MHz even…) then there’s no problem also. I’m wondering which memory you are using?
For me OS, drive and BIOS all have been already ruled out as possible suspects. The memory seems to be compatible and i see it’s a popular choice in this forum, but regardless there seems to be something wrong with it or the combination.