Combination price problems on prestahop 1.7.7.7

[skeccy]

Good mornig, after upgrade prestashop from 1.7.7.6 to 1.7.7.7 i have a problem on combination price.  

When I try to enter a price in the product combination details sheet, it is not entered correctly. The entry seems to have gone mad, despite trying to delete the price and re-enter it, the latter is entered wrong again. I am attaching a small video to make you understand what happened to me?

Can anyone help me to solve the problem?
Prestashop 1.7.7.7

Thanks

[mickine]

I've got the same problem 😞 Did you found any solution?

Thanks and greetings from germany

[skeccy]

The problem solved here, but i don't understand where is located the file on prestashop 1.7.7.7 for the modification

https://github.com/PrestaShop/PrestaShop/pull/25749/files