Fatsboot boot bug (phone doesn't boot)

[KonstantIMP]

Hello!

Now I have a trouble with my Nokia 7.1.
When I try to boot twrp or another kernel (boot.img) it stuck. I do '"fastboot boot twrp.img" or "fastboot boot boot.img" and my phone frozes on Android One logo.
And if problem with twrp can be solved (first enter "fastboot flash recovery twrp.img" and only than "fastboot boot twrp.img"), problem with boot.img is still relevant.
I noticed, that after "fastboot boot ..." phone restarts into download mode.
My phone is unlocked.

Thank

 

[singhnsk]

Hi, before any boot command, you'll need to do that flash recovery counterpart. You can do it on a standard boot image as well, not just TWRP. There's no recovery partition, so, nothing gets flashed. But it somehow allows us to boot our bootable img files.
So,

fastboot flash recovery boot.img
fastboot boot boot.img

 

[KonstantIMP]

Hi, before any boot command, you'll need to do that flash recovery counterpart. You can do it on a standard boot image as well, not just TWRP. There's no recovery partition, so, nothing gets flashed. But it somehow allows us to boot our bootable img files.
So,

fastboot flash recovery boot.img
fastboot boot boot.img

Yes! Thank you.
I recently came to this conclusion, but what is it?
Does it bootloader bug or anything else?