Unitary product price are not updated in the shopping cart when combinations of the same product are added

[carlosrgc]

I have a  product  and  its  combinations based on  color attribute ( red and yellow).

I have created specific  prices  for  each  color combination  and quantity

If   different combinations  of a product  are  added  to the shopping cart,  the  unitary  price for each combination is  shown incorrectly

Even  increasing  or decreasing the  amount  of the  combination  do not take effect  on unitary  price although some amount  discount have  been  created (specific prices based on amount and attribute)

I found the  error in two  prestashop  installations (1.6.1.13  & 1.6.1.15) and a fresh 1.6.1.17  to reproduce the error

Any  idea how to fix  the problem?

convertido2.mp4

Edited December 9, 2017 by carlosrgc (see edit history)