With the version of your phone version L681H, you did not have to see tested the version of nougat
since it was only for the Chinese version
then things that you mention happen
There was a lot of post saying that it was only the Chinese version
luck

The model of your phone as I suppose is the same as mine that you have posted in section M3 note is the L681H
and for our phone until the end of December of this year until the beginning of January 2018. Forget the nougat