Changes on the product characteristics order are not saved

[Antakarana]

Hi!

I'm using prestashop 1.7.6.8 with the warehouse template (on its last version), we have a strange issue with characteristics order on products. Problem is that I change the position of the characteristics of a product but the changes are not saved (even if the backoffice shows a popup message notifying that the change was saved).  🙄 

This is what I do:

Backoffice --> catalog --> atributes/characterstics  --> order position (notice that ther are some products with the '1' position)

Then I order the products on the position I want (I have moved up "D.O." and "Tipo" as an example)...

Notice that the pop up message shows OK to the changes and also the position order now shows a correct order (1,2,3,...)

...........However after checking the frontend I can see that there is not real change on the product characteristics order fields . 🙄  And if I go back to backoffice I can see that the product characteristics order fields is again wrong (like on the first image).

I have cleared cache and also tried this on different browsers with the same result.... so I guess it is not a browser or "cache" issue.  Also debug mode is not showing any error.

I'm stucked at this point so any help would be apreciated.... 🙏

Thanks in advance!

Edited November 4, 2020 by Antakarana
corrección ortográfica (see edit history)

[musicmaster]

Check for php and javascript errors. 

As an alternative you might try sorting with Prestools (it is free). Sometimes once sorting there solves the problem (it will at least solve the multiple position-1's).

[Antakarana]

thanks I will check it...