Flash fails when power cycling is done

Power cycling the board ,sometimes causes the flash memory to fail.We have to burn kernel and file system again to make it work.
We are using u-boot as bootloader.

Which Linux Image version is used ?

Linux version 4.4.21

Seems you are using older Linux image, can you please use our latest Linux image and check. It will be very much helpful if you can provide us some boot logs and/or the cases you observe such issues.

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The boot log has been attached.
HW: ColVF50 128MB V1.2A 04931026
Carrier Board : Plus Viola V1.2A 00002447

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The boot log during ubifs load failure has been attached.