UBIFS assert failed after NAND flash update

Hi, after re-flashing our image (using mender) we getting UBIFS assert failed dump to console once after it reboots into the updated image. Future reboots it does not occur.

I would like to understand the root cause as having units fail in the field could be disastrous for our company.

Can anyone assist what could be root cause?

The exact dump is here:
http://www.toradex.com/community/comments/58364/view.html

Some initial discussion here:
http://www.toradex.com/community/comments/58426/view.html

https://www.toradex.com/community/questions/45069/recommend-ota-method.html?childToView=58433#comment-58433

What exact hardware (moduls and carrier board) and software versions of things are you talking about?