Falcon mode: hangs on booting Linux

Hi all
I have some problems with a TI AM335x and U-Boot Falcon mode. My Linux kernel does not want to boot 'the old way' using ATAGS in Falcon mode. Using plain U-Boot the kernel boots like it should.
Setting up all: setenv bootargs root=/dev/mmcblk0p6 console=ttyS0,115200n8; fatload mmc 1:3 0x82000000 uImage; spl export atags 0x82000000; fatwrite mmc 1:1 0x80000100 args 0x200; saveenv; reset;
In this case my kernel boots. If I powercycle the board, U-Boot hangs on 'Jumping to Linux' in 'spl.c: "jump_to_image_linux"' I am using U-Boot 2020.07
Printing the args file, shows my bootargs are set. Adding debug before jump_to_image_linux, shows the Linux header is read and it knows its entry_point and load_addr
Thanks for showing me the way Ayrton
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Ayrton Leyssens