1.7 Bug on combination change in product page

[lucaMDT]

I have encountered a problem using the combinations in product page on frontend.
I organized the attributes in the following order: size, color.
In product page, I initially selected a size-color with quantity greater than 0 (Es. L-Red with quantity=1). When I choose a size (Es. select M size) and for that size-color combination the quantity is zero (Es. M-Red with quantity=0), it doesn't update the color selection with the available ones. It's selects a initial combination.
This is an example on my site:

https://www.haresabbigliamento.it/maglioncini-uomo/197-3060-engellz-tinta-unita.html
The M-Arancione combination is selected.
I change the size to L and the problem occurs. Return to select M-Arancione.

What can I do for this problem?

 

[lucaMDT]

2 hours ago, ndiaga said:

Hi,

I  see  that   you  don't   have  that  much  number  of   combinations  so  I  think  using  a  module  like  this  one  will  be  best  option:

 

the bug is extremely serious, is there really no solution?
the form you have indicated to me is not an optimal solution

[lucaMDT]

On 5/17/2020 at 1:15 PM, ndiaga said:

If  the  quantity  of  a  combination  is  zero  it  is  a  normal  behaviour.

You  just   need  to use  a  module like  the  one I  listed   or   another  solution  to  explicitly   explain  that  to the  customer.

Here  is   also  a  tutorial  :  PrestaShop desable product combinations when out of stock

OK, I have resolved with your solution.

Thanks