Situation

We have a MikroTik Cloud Core Router CCR1036-8G-2S+, after Upgrade to Version 7.2 the router gets unreachable.
The Router was in a boot loop, so we plugged in a Serial Cable to check what is wrong:

RouterBOOT booter 3.27

CCR1036-8G-2S+

CPU frequency: 1200 MHz
  Memory size: 4096 MiB
    NAND size: 1024 MiB

Press any key within 2 seconds to enter setup..

loading kernel... OK
setting up elf image... OK
jumping to kernel code
Could not mount ubifs/yaffs filesystem: No such device
[   20.021897] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00                                                                                                                                                             000000
[   20.022089] CPU: 27 PID: 1 Comm: init Not tainted 5.6.3 #3
[   20.022140]   frame 0: __schedule+0x12288/0x7e6978 (sp 0xfffffe0075cffb20)
[   20.022172]   frame 1: __schedule+0x7c0c20/0x7e6978 (sp 0xfffffe0075cffb90)
[   20.026613]   frame 2: __schedule+0x3cb80/0x7e6978 (sp 0xfffffe0075cffbc0)
[   20.034176]   frame 3: __schedule+0x40dd0/0x7e6978 (sp 0xfffffe0075cffc80)
[   20.041738]   frame 4: __schedule+0x432d8/0x7e6978 (sp 0xfffffe0075cffd20)
[   20.049301]   frame 5: __schedule+0x433a0/0x7e6978 (sp 0xfffffe0075cffd60)
[   20.056864]   frame 6: __schedule+0x7e41c0/0x7e6978 (sp 0xfffffe0075cffd80)
[   20.064521]   <syscall 94 while in user mode>
[   20.069358]   frame 7: 0x45110 (sp 0x7f8ffb40)
[   20.074222] Rebooting in 5 seconds..
Resetting chip and restarting.

Workaround